Seminarios científicos impartidos por científicos y tecnólogos del IAA y de los muchos centros e instituciones de investigación que nos visitan. Muestra del intenso intercambio científico, se celebra a las 12:30 de cada jueves. Los seminarios se retransmiten en directo en IAA - CSIC Seminars Live.

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1 - 250 de un total de 889


29/06/2017 - 12:30
An overview of the first science from the Sunrise II mission
On June, 2013, a second edition of the Sunrise stratospheric, balloon-borne mission took place from Kiruna (Sweden) to Northern Canada. During these five days, the instruments aboard Sunrise were observing the Sun for long periods of stable conditions. New and interesting science has come out from this second flight, which has been published in a special issue of ApJ Supplement. In this talk, I’ll summarize a bunch of these first results to...
Dr. Jose Carlos del Toro Iniesta
22/06/2017 - 12:30
Prof. Antxon Alberdi
08/06/2017 - 12:30
Dr. Jeff Scargle
01/06/2017 - 12:30
Servicios Administrativos en el IAA
La actividad científica e investigadora en el IAA, requiere el apoyo y soporte de gestión de las unidades de servicios administrativos. Estas se componen de los servicios económico-administrativos y los servicios generales (Biblioteca, Mantenimiento, Ordenanzas). Estas unidades gestionan los medios y recursos materiales, económicos y personales que el IAA tiene asignado. Se expondrá una visión general de los servicios, con la tareas...
Fernado Bordons, Gerente del IAA
25/05/2017 - 12:30
Dwarf galaxies
John Cannon
18/05/2017 - 12:30
Bombs and flares at the Surface and Lower Atmosphere of the Sun
Prof. Viggo Hansteen
11/05/2017 - 12:30
Blender 3D, el progBlender 3D, el programa definitivorama definitivo
Blender es un potente programa multiplataforma que se distribuye libremente y es de código abierto. Entre sus aplicaciones más inmediatas está el modelado y la animación 3D, pero es un programa muy versátil que se puede usar para muchos otros propósitos. En esta charla presentaremos ejemplos de uso de Blender para la visualización de datos científicos y divulgación de la Ciencia; para la creación de diseños y piezas tridimensionales que pueden...
Dr. Francisco M. Gómez Campos
28/04/2017 - 12:30
Gravitational waves: the "other light" from Cosmos
First direct detections of gravitational waves were reported in the first half of 2016. These observations represented: i) a confirmation of a fundamental prediction of General Relativity dynamics, and ii) a demonstration of the existence of binaries of stellar-mass black holes capable of merging in a timescale shorter than the Universe's age. This talk will review the basic elements needed to frame the two statements above. The presentation...
Prof. J.L. Jaramillo
27/04/2017 - 12:30
The large abundance discrepancy phenomenon in planetary nebulae
The discrepancy between chemical abundances computed using optical recombination lines (ORLs) and collisionally excited lines (CELs) is a major unresolved problem in nebular astrophysics, with significant implications for the determination of chemical abundances throughout the Universe. In planetary nebulae (PNe), a common explanation of this discrepancy is that two different gas phases coexist: a hot component with standard metallicity, and a...
Dr. Jorge García Rojas
20/04/2017 - 12:30
Spatially resolved star formation history of CALIFA galaxies: Implications for galaxy formation
One year after the final data release of the CALIFA survey, I will revise the results obtained from the analysis of the spatially resolved stellar population properties of galaxies and their impact on our knowledge on galaxy formation and their evolution. I will do special emphasis in the more recent results on the spatially resolved star formation histories of galaxies obtained for our group at the IAA. I will show, in my opinion, the...
Prof. Rosa González Delgado
06/04/2017 - 12:30
Fractal analysis in pulsating stars: what is and what we can learn from it
I will describe the basic ideas of my line of research, concerning the develop of classification criteria and algorithms for the identification of delta Scuti, gamma Doradus and Solar-like pulsating stars, based on chaos analysis and multi-fractal analysis. In fact multi-fractal behaviour in light curves, which emerges at the onset of chaos, could be the fingerprint of the stochastic mechanism of modes excitation, due to an outer convective...
Dr. Sebastiano de Franciscis
30/03/2017 - 12:30
Star formation in nearby early-type galaxies
It is well known that there is little star formation activity in early-type galaxies. By cross-matching SDSS DR 7 with RC3 catalog and visually checking the SDSS images, we derive a sample of 583 S0 galaxies with the central spectrophotometric information. In order to separate nebular emission lines from the underlying stellar contribution, we fit the stellar population model to the SDSS spectra of these S0 galaxies. According to the BPT diagram...
Dr. Qiusheng Gu
23/03/2017 - 12:30
Detection of gravitational waves from space: the LISA mission
The idea of detecting gravitational waves from space has been under consideration for more than 25 years. In 2012, the advisory bodies of ESA decided that the next-but-one "large mission", L3, will be devoted to this. Launch is scheduled for 2034. In 2015, the Director of Science of ESA appointed an external committee, with Michael Perryman as chair, to advise on the technical feasibility of the LISA mission, and the technology development...
Prof. M. Perryman
16/03/2017 - 12:30
Space astrometry: the Hipparcos and Gaia missions
The talk will provide a short historical context and describe the scientific motivation for these missions, outline the essential experimental principles which underpin their measurements, and give an overview of the science objectives, including Gaia's expected yield of many thousands of astrometrically-detected exoplanets.
Prof. M. Perryman
09/03/2017 - 12:30
Recovering information beyond the power spectrum of large-scale structure
Future galaxy surveys of the large-scale structure in the Universe will provide a wealth of new data and make it possible to use higher-order statistics beyond the power spectrum, such as the bispectrum (or 3-point correlation function), to constrain galaxy clustering, the standard LCDM cosmology, and many of its possible extensions. However, it may be possible and preferable to use recently devised alternative statistics, such as the line...
Dr. Joyce Byun
02/03/2017 - 12:00
Supermassive Black Holes: Impact on Galaxy Formation and Evolution
Supermassive black holes, weighing between millions to billions times the mass of the Sun, are believed to power quasars and other energetic activity in the centers of galaxies. With the help of advanced telescopes from the ground and in space, operating across the electromagnetic spectrum, astronomers have now discovered that supermassive black holes not only exist, but that they are very common and play a critical role in the formation and...
Prof. Luis Ho
23/02/2017 - 12:30
The impact of environment and confusion of the observed HI galaxy population
The HI galaxy mass function represents a fundamental component of our understanding of the gas content of galaxies. How its form varies throughout the local Universe and as a function of redshift is key to developing a complete picture of galaxy evolution. We use the ALFALFA 70% catalogue, the largest uniform catalogue of extragalactic HI sources to date, to explore the environmental dependence of the HI mass function based on the projected...
Michael Jones
16/02/2017 - 12:30
Cold plasma and magnetic reconnection at the magnetopause boundary layer
Magnetic reconnection is a fundamental plasma process that permits the exchange of energy and mass between colliding plasmas, e.g., between the Solar Wind and the Earth's magnetosphere. Several studies have reported the presence of cold plasma of ionospheric origin at the magnetospheric side of the magnetopause boundary layer. As a result, the particle distribution functions involved in reconnection are far from equilibrium, exhibiting a cold...
Dr. Sergio Toledo Redondo
09/02/2017 - 12:30
Molecular gas and dust in low-metallicity starbursts
Metal-poor, star-forming, dwarf galaxies play a fundamental role in galaxy formation and evolution, and according to LambdaCDM models may be the building blocks of most of the galaxies in the universe today. Although the interstellar medium (ISM) in such galaxies was thought to be virtually dust-free, over the last decade, observations have shown that dust can be an important constituent of even a low-metallicity ISM. However, the molecular...
Dr. Leslie Hunt
02/02/2017 - 12:00
Living on the Edge: Superthin Galaxies and the Cosmic UV Background
Superthin galaxies are bulgeless, late-type spiral galaxies seen edge-on. HI synthesis observations probe the kinematic structure of their interstellar medium. Observations of these isolated, quiescent galaxies have reached column densities as low as few x 1018 atoms . cm-2 . The simple structure of the superthins makes them ideal cosmological laboratories (Uson and Matthews, Astron. J. 125, 2455, 2003). I shall present the results of high-...
Prof. Juan Usón
31/01/2017 - 12:30
Asteroid surfaces: irradiation and VIS-IR micro-spectroscopy in the laboratory
Primitive extraterrestrial materials, such as meteorites and dust collected by sample return missions, are characterized by a large compositional heterogeneity at different scales. This heterogeneity has been observed in the laboratory by different techniques. Among these, micro-IR spectroscopy has the advantage of being totally non-destructive and allowing direct comparison with astronomical observations. With the development of Focal Plan...
Dr. Rosario Brunetto
26/01/2017 - 12:30
Novae as Lithium factories in the Milky Way
The abundance of Lithium observed in very young stellar populations is ~4 times larger than the primordial one estimated by recent Planck measurements. Since Lithium is easily destroyed in stellar interiors, the search for astrophysical sources responsible for of the observed Lithium over-abundance was a mystery for decades. In this seminar I'll discuss the recent detection of Lithium in the spectra of two slow novae, V1369 Cen and V5668 Sgr,...
Dr. Luca Izzo
19/01/2017 - 12:30
Witnessing the birth of a planetary nebula
Planetary nebulae are one of the last stages of evolution of stars like our Sun. The beginning of photoionization, giving rise to a new planetary nebula, will certainly produce dramatic changes in the object, but this instant is difficult to observe, since it will only take a few decades. During of a long-time study of water masers in post-AGB stars and planetary nebulae, we identified an object (IRAS 15103-5754) in which we believe...
Dr. Jose Francisco Gómez
12/01/2017 - 12:00
Calar Alto, presente y futuro
Esta charla pretende dar una visión general del estado actual del observatorio de Calar Alto mostrando los principales hitos conseguidos en los últimos años. La re-apertura de instalaciones, la concesión de nuevas ayudas del MINECO para mejoras de infraestructuras y la celebración del workshop de instrumentación en Granada, ha abierto un nuevo escenario que el observatorio va a afrontar en los próximos años.
Dr. Jesús Aceituno, director de CAHA
02/12/2016 - 12:30
Multiwavelength analysis of PBC J2333.9-2343
Nuclear activity as is observed in active galactic nuclei (AGN) might be a phase occurring in all galaxies, and this activity could be recurrent. A perfect laboratory to test these scenarios are the giant radio galaxies, since their emission can be as old as 10⁷-10⁸ years. In the present work we focus on the nucleus of PBC J2333.9-2343, which called our attention because it is a giant radio galaxy that shows different and incompatible...
Dr. Lorena Hernández García
01/12/2016 - 12:30
History of solar activity recorded in polar ice
Un equipo de investigación internacional en el que participa el conferenciante ha reconstruido la actividad magnética solar de los últimos diez mil años analizando para ello la concentración de isótopos cosmogénicos.
Dr. Antonio Ferriz
24/11/2016 - 12:30
Big Data at the IAA: main ideas and how to run a real application at the IAA computation cluster
A brief description of the Big Data paradigm is presented minimizing the technical details, reviewing previous work at IAA and showing a practical case demonstration.
Dr. Rafael Morales
17/11/2016 - 12:30
The CaII triplet in Quasars: from the accretion disk to the star formation
Active galactic nuclei (AGN) show a great diversity of optical and UV emission line properties. Dynamical and physical models should be built accordingly. The presence of strong FeII emission suggested the existence of a region shielded from high energy photons, where the low ionization lines are emitted.
Mary Loli Martínez Aldama
10/11/2016 - 12:30
Very High Energy gamma rays from AGNs: key for AGN structure and cosmological studies
The key for AGN structure and cosmological studies.
Dr. Josefa Becerra
09/11/2016 - 12:00
Star Formation Close to and Accretion onto the Supermassive Black Hole Sgr A*
The environment of Sgr A* provides a window to the close-up study of star formation under extreme physical conditions
Prof. Farhad Yusef-Zadeh
03/11/2016 - 12:30
A search for neutral gas outflows in nearby (U)LIRGs
I will present a search for outflows in a sample of 38 local (U)LIRG systems (51 individual galaxies) observed with VIMOS/VLT and SINFONI/VLT integral field units.
Dr. Sara Cazzoli
24/10/2016 - 12:30
RadioAstron observations in the jet in 0836+710
Space VLBI observations with RadioAstron provide an extraordinary improvement of angular resolution.
Laura Vega
20/10/2016 - 12:30
The Unfied Model for AGN 30 years after, and recent support for an Evolutionary Model of AGN
I shall comment on the difficulties faced today by the so called "Unified Model" (UM) for AGN.
Prof. Deborah Dultzin Kessler
04/10/2016 - 12:30
The VIMOS Ultra Deep Survey: galaxy formation and evolution, 13Gyr back in cosmic time
The first phases of galaxy formation and evolution remain poorly understood and improved observational constraints are needed to test the theoretical picture and simulations. I will present the results from the VIMOS Ultra-Deep Survey (VUDS)
Prof. Olivier Lefevre
29/09/2016 - 12:30
Presentation of the HETH group (High Energy Transients and their Hosts)
HETH (High Energy Transients and their Hosts) is one of the youngest groups at IAA, founded in 2012, and belongs to both the extragalactic and stellar department. Thanks to recent success in funding applications, both by the group and by external researchers, HETH has now grown to a group of 7 young researchers.
Dr. Cristina Thöne
22/09/2016 - 12:30
Delving into the gas-phase of CALIFA galaxies to trace O and N gradients
CALIFA (Calar Alto Legacy Integral Field Area survey) has provided spatially resolved optical spectra of thousands of HII regions in spiral galaxies of the Local Universe whose properties can be linked with the integrated properties of the host galaxies...
Dr. Enrique Pérez Montero
15/09/2016 - 12:30
Proxima b: What could I say you already do not know about it?
This august, we have published clear evidence of a planet orbiting the nearest star to Earth, Proxima Centauri, at a distance of 1.295 parsecs (4.2 ly) and one of the best-studied low-mass star.
Dr. Pedro Amado
23/06/2016 - 12:30
Using the local gas-phase oxygen abundances to explore a metallicity-dependence in SNe~Ia luminosities
In this talk I present an analysis of the gas-phase oxygen abundances of a sample of 28 galaxies in the local Universe (z<0.02) hosting Type Ia Supernovae (SNe Ia). The data were obtained with the 4.2m William Herschel Telescope (WHT).
Manuel Moreno Raya
16/06/2016 - 12:30
Space VLB interferometer RadioAstron: status and results
The RadioAstron Space VLBI mission utilizes the 10-m radio telescope on-board the dedicated Spektr-R spacecraft to observe cosmic radio sources with an unprecedented angular resolution at 92, 18, 6 and 1.3 cm.
Yuri Kovalev
09/06/2016 - 12:30
Blazars: Order and Disorder
Blazars are the most luminous persistent objects in the sky. They emit light across the entire electromagnetic spectrum, from low-energy radio waves to high-energy gamma-rays, and they exhibit variability on timescales that range from years down to minutes. The launch of the Fermi Large Area Telescope (LAT) in 2008 has ushered in a new era of high-energy astrophysics.
Prof. Nicholas Macdonald
02/06/2016 - 12:30
Star formation and AGN activity in the most luminous LINERs in the local universe
In this talk I will focus on the most luminous LINERs in the local universe, where we studied their SF and AGN activity in order to understand the LINER phenomenon in relation to star-forming galaxies and to compare their properties with those of the LINERs at z ~ 0.3.
Dr. Mirjana Povic
25/05/2016 - 12:30
ECS: Diseño y construcción de Observatorios Astronómicos
ECS es una empresa de ingeniería especializada en Observatorios Astronómicos. Realiza los pertinentes estudios y evaluaciones de calidad de cielo, logística y necesidades específicas, para ubicar y diseñar el observatorio.
Francisco Ángel Espartero Briceño
19/05/2016 - 12:30
The magnetic field vector in solar chromospheric structures: the diagnostic potential of the near infrared He I 1083nm triplet
The solar chromosphere is permeated by solar structures such as sunspots, surges, flare ribbons, prominences (filaments) or spicules, where non-local thermodynamic equilibrium effects dominate the state of the plasma and where the magnetic fields are expected to be much lower in intensity than in the photosphere underneath.
Dr. David Orozco
12/05/2016 - 12:30
Sgr A* and its environment: insights from X-ray observations
Almost every massive galaxy has at least one super-massive black hole (SMBH) at its center. Most (>90%) of those SMBHs are quiet. Understanding the accretion of low-luminosity SMBHs represents a very important and fundamental problem in astronomy.
Dr. Daniel Wang
05/05/2016 - 12:30
Formación Estelar: ¿podemos acotar el problema?
Mientras que la evolución estelar conforma un cuerpo teórico bien estructurado, incluyendo aquí las últimas fases de la misma, la formación estelar está lejos de admitir una formulación teórica predictiva que permita, conociendo las propiedades físicas de la nube molecular, pergeñar las propiedades de la futura población estelar naciente.
Dr. Emilio Alfaro
28/04/2016 - 12:30
The lifetime dilemma of evaporating black holes
The standard view is that black holes exist, maybe not with all the properties of strict black holes in classical General Relativity, but sufficiently close to them that one does not need worrying in the astrophysical practice.
Dr. Carlos Barceló
21/04/2016 - 12:30
Colloquium on ERC's proposals
Colloquium on ERC's proposals
Drs. Alejandro Luque & Rainer Schoedel
18/04/2016 - 12:30
Issues in star and cluster formation
The upper mass stellar initial mass function is similar to the mass function of young star clusters. I argue that this is a basic result expected when gravitational focusing on scales much larger than the Jeans length operate. I will also present recent VLBI studies of Orion which yield new distance estimates.
Prof. Lee Hartmann
13/04/2016 - 12:30
Young brown dwarfs: exploring the bottom of the Initial Mass Function
Brown dwarfs are the objects that bridge the realms of stars and planets, making them important benchmarks for testing star and planet formation theories. In particular, studies of brown dwarfs at young ages are crucial for understanding the mass dependence in the formation and early evolution of stars.
Lda. Koraljka Muzic
07/04/2016 - 12:30
CARMENES as a precursor for HIRES@E-ELT: First results at the telescope
CARMENES (Calar Alto high-Resolution search for M dwarfs with Exoearths with Near-infrared and optical Échelle Spectrographs) is the next generation instrument built for the 3.5m telescope at the Centro Astronómico Hispano-Alemán (Calar Alto Observatory; CAHA, Almería, Spain).
Dr. Pedro Amado
31/03/2016 - 12:30
Are LIGO data connected?
The analysis of ultra-precise data of stellar light variations observed with satellites (CoRoT, Kepler, SoHO, etc.) has revealed some unexpected results that cannot be explained by theory.
Prof. Rafael Garrido/Dr. Javier Pascual
17/03/2016 - 12:30
OCTOCAM: A fast multi-channel imager and spectrograph proposed for the Gemini Observatory
OCTOCAM has been proposed to the Gemini observatory as a workhorse imager and spectrograph that will fulfill the needs of a large number of research areas in the 2020s.
Dr. Antonio de Ugarte
10/03/2016 - 12:30
Shaking the grounds of unification: are type 1 and type 2 AGN intrinsically different?
The simplest standard unified models of Active Galactic Nuclei (AGN), put forward more than 30 years ago, postulate that the diversity of observed properties of AGN can be largely explained as a viewing angle effect resulting in anisotropic nuclear obscuration. A key ingredient of these models is a homogeneous distribution of dust and gas located at tens of parsecs that obscures the AGN nuclear region from certain lines-of-sight (the ‘torus’)....
Dr. Silvia Mateos
04/03/2016 - 12:30
Multiwavelength studies of massive stars
We will review the importance of multi-wavelength studies of massive stars and how each of the wavelength ranges may provide crucial and complementary information to characterize these objects. We will discuss the consistency of UV through radio studies of O stars, LBVs and WRs as well as the reliability of analyses based on a limited wavelength region.
Dr. Francisco Najarro
01/03/2016 - 12:30
Massive galaxy clusters: from relaxed to highly substructured
Galaxy clusters are important in cosmology to set constraints on various parameters, but they are also intrinsically interesting, since they allow to study many physical processes. The DAFT/FADA survey of 90 clusters in the redshift range 0.4<z<0.9 has allowed us to analyse several aspects of clusters, linked with their formation. We will present here our search for substructuring and its variation with redshift. For subsamples of clusters...
Florence Durret
25/02/2016 - 12:30
Progress on the construction of the South African SKA Pathfinder (MeerKAT) and the African VLBI Network &The Australian Square Kilometre Array Pathfinder (ASKAP)
Progress on the construction of the South African SKA Pathfinder (MeerKAT) and the African VLBI Network &The Australian Square Kilometre Array Pathfinder (ASKAP)
Drs. Tracy Cheetham & Antony Schinckel
18/02/2016 - 12:30
Experimental simulation of the atmospheric ablation of cosmic dust particles: implications for HPLA radar and lidar observations
The inner solar system is full of interplanetary dust particles (IDPs) originating from cometary trails and collisions between asteroids. The entry and evaporation of IDPs in planetary atmospheres is related to a variety of phenomena including formation of mesospheric metal layers and clouds, and stratospheric aerosol chemistry.
Dr. Juan Carlos Gómez Martín
11/02/2016 - 12:30
The role of magnetic field for stability in relativistic jets
Relativistic jets have been observed or postulated in various astrophysical sources, including active galactic nuclei, microquasars in the galaxy and gamma-ray bursts. There are many unsolved problems related to the relativistic jets, for example, formation & acceelration, collimation, and long-term stability. The most promising mechanisms for producing and accelerating relativistic jets, and maintaining collimated structure of relativistic...
Dr. Yosuke Mizuno
04/02/2016 - 12:30
ORISON un proyecto de instrumentación astronómica estratosférica
ORISON es un proyecto financiado por el H2020 de la Unión Europea, dentro de la convocatoria INFRASUPP2, coordinado desde el IAA. Su objetivo principal es estudiar la viabilidad de una infraestructura de investigación basada en globos que permitan poner, a costes razonables, instrumentación de no demasiado peso (<500 kg) en plataformas estabilizadas, a alturas estratosféricas, del orden de 40km sobre el suelo, con objeto de conseguir metas...
Dr. Jose Luis Ortíz
28/01/2016 - 12:30
Spectro-interferometry study of red supergiants
Red supergiant stars (RSGs) are cool and massive stars that evolve toward Wolf-Rayet stars and supernovae. They have extended atmospheres and strong stellar winds, which lead to significant mass loss. Currently, the mechanisms that explain the large observed atmospheric extensions are open to debate. The estimation of the fundamental parameters of these stars and their location in the HR diagram are very important for calibrating the...
Dr. Belén Arroyo-Torres
14/12/2015 - 11:30
Challenges of the Doppler technique in the presence of stellar noise for the detection of Earth-like exoplanets
The Doppler method is still the most efficient one in detecting exoplanets around nearby stars which are amenable for further characterization. In particular, planets as small as the Earth can in principle be detected in hot orbits around sun-like stars (G and K dwarfs), and warm to temperate orbits around M-dwarfs (M<0.5 sun) in orbital periods from a few days to tens of days. Unfortunately, these time-scales are plagued with structured...
Dr. Guillem Anglada-Escude
03/12/2015 - 13:30
Presence and future of adaptive optics at the ESO VLT
In this brief talk I will present the current and near-future adaptive optics (AO) capabilities of ESO's VLT. I will report on a recent meeting at ESO, where we discussed science cases for future AO instrumentation at the VLT in the era of the E-ELT. Probably within the next year, the science cases for a 3rd generation AO instrument (to arrive at the VLT in ~ 2025) will be laid down in a white paper. The goal of my talk is to get the IAA...
Rainer Schoedel
26/11/2015 - 13:30
Following the posterior with the ALHAMBRA survey
The probability distribution functions (PDFs) provided by photometric redshift codes such as BPZ are a powerful tool for galaxy evolution studies. Despite of their potential, only a few studies in the literature attempt to use the full PDFs in their analysis and we are still learning how to make the most of them. We present the latests PDF advances from the ALHAMBRA survey, focusing in the estimation of the B-band luminosity function. We...
Carlos López-Sanjuan
12/11/2015 - 13:30
High Spatial Resolution 2D Nebular Abundances in Disk Galaxies
Galaxies evolve through the changes that face their various components such as the gas, dust, stars, and dark matter. Gas and dust are prime ingredients for the formation of new stars, and thereafter the massive stars newly formed will quickly modify the chemical composition of galaxies whereas low mass stars will take more time to contribute to the interstellar gas enrichment. Beside the stars, other processes occurring during the galaxies...
Laurie Rousseau-Nepton
08/10/2015 - 14:30
Dissecting a rare galaxy merger (the Hummingbird) with radio and mm-observations
The Bird is a luminous infrared galaxy product of a triple merger. Previous infrared observations have shown that the ongoing star formation in the least massive of the components (the head) outshines that of the mprimary nuclei (the heart and the body). This clashes with the commonly accepted major merger scenario in which the SF is expected to be higher in central compact regions. Here I will present preliminary results...
Cristina Romero-Cañizales
24/09/2015 - 14:30
Test In Space, your opportunity to experiment in orbit
Traditionally, experimentation in space has consisted in limited, expensive, long-term and complicated projects with hard requirements and restrictions. Currently, new space increases the possibilities to experiment in space for researchers from all kind of fields and, with TEST IN SPACE, this is also simple and fast. If you are interested in investigation under real space environment, you can just propose it to TEST IN SPACE. TEST IN SPACE...
17/09/2015 - 14:30
Baryon Acoustic Oscillations and the Expansion History of the Universe
The tiny inhomogeneities left over from the inflationary phase seeded the early Universe with primordial density perturbations. The photon-baryon fluid reacted to these perturbations by forming spherical pressure waves known as baryon acoustic oscillations (BAO). These waves propagated through the primordial plasma until the Universe became transparent to radiation, effectively stopping the dragging of the baryons by the photons. This left...
A. J. Cuesta, on behalf of the BOSS Collaboration
11/09/2015 - 14:30
Untold Stories of Andromeda: A Multi-wavelength View of The Nuclear Environment in M31
The Andromeda galaxy (M31), which harbors the nearest LINER and the closest stellar bulge accessible in the optical, is an ideal laboratory for studying the physical regulation of galactic nuclei, and in turn the co-evolution of super-massive black holes and their host galaxies. I will provide an overview of the stellar and interstellar components of the M31 bulge, as well as its dormant but otherwise well-known SMBH, M31*. I will introduce...
Prof. Zhiyuan Li
17/06/2015 - 14:30
Into Darkness: the seek for pulsars in the Galactic Centre
Pulsars are highly-magnetized rotating neutron stars that emit beams of electromagnetic emission. They are unique astronomical laboratories, not only because they are the most magnetized, densest, directly-observable objects in the Universe, but also because they act as extremely precise clocks located all over the Galaxy. The variety of science enabled by pulsars is very broad, from, e.g., limits on the Equation-of-...
Pablo Torne
15/06/2015 - 14:30
The influence of dynamics on airglow and constituents in the terrestrial mesopause region
In the terrestrial atmosphere, the mesopause region (~90 km height) is a transition region between the inviscid lower/middle atmosphere and the geomagnetically forced geospace. It is a region of strong dynamical forcing and where several constituents vary strongly with height one of which is atomic oxygen. Airglow, which is the result of naturally occurring chemiluminescence in the mesopause region involving exothermic reactions associated...
Prof. William Ward
11/06/2015 - 14:30
Ubiquitous magnetic flux emergence in the Sun: a fundamental process
The fundamental process of magnetic flux emergence happens continuously and everywhere over the solar surface, hence the ubiquitousness. No matter which spatial (granular, supergranular, active region) and temporal scale we look at buoyant magnetic field coming from the convection zone pierces the photosphere in the form of two opposite polarities and travels upwards through the solar atmosphere. We will describe the general characteristics...
Ada Ortiz Carbonell
09/06/2015 - 14:30
Massive Star Formation at the Puerto Varas Workshop
The recent decades have witnessed major advances in our understanding of the formation of solar-mass stars. However, the formation mechanisms of stars at the extremes  of the mass range, that is, on one hand very massive stars and in the other brown dwarfs, remain poorly understood. I will summarize the main results presented in a recent meeting on massive star formation that took place in Puerto Varas,...
Luis F. Rodriguez
28/05/2015 - 14:30
Observing the onset of outflow collimation in a massive protostar: assembling the puzzle
The current paradigm of star formation through accretion disks, and magnetohydrodynamically driven gas ejections, predicts the development of collimated outflows, rather than expansion without any preferential direction. We present radio continuum observations of the massive protostar W75N(B)-VLA 2, showing that it is a thermal, collimated ionized wind and that it has evolved in 18 years from a compact source into an elongated one. This...
José María Torrelles
14/05/2015 - 14:30
ASKAP Commissioning and Early Science
The Australian Square Kilometre Array Pathfinder (ASKAP) is a new generation low frequency (700-1800 MHz) interferometer capable of a wide instantaneous field of view of 30 square degrees, which is realised with the Phased Array Feed (PAF) technology. The first stage of the instrument, which consists of 6 first generation PAFs and is called Boolardy Enigeering Test Array (BETA), has been brought into operations...
Maxim Voronkov
30/04/2015 - 14:30
Seven Solutions: industria para las grandes infraestructuras científicas en Granada
Seven Solutions es una compañía tecnológica con amplia experiencia diseño de electrónica, software empotrado y mecánica. Colabora con empresas como Indra, Thales, Cibernos, Siemens o National Instruments. Seven Solutions cuenta con una dilatada experiencia en el campo de la industria de la ciencia, participando activamente en iniciativas open hardware como el
Javier Díaz Alonso
16/04/2015 - 14:30
The San Pedro Mártir observatory and its UBVRI photometric survey of Galactic clusters
A short presentation of the San Pedro Martir Observatory will be given including its astroclimatic characteristics and its projects for the near future. I will then present the current status of our ongoing survey aimed at generating a homogeneous catalogue of physical parameters of stellar clusters in our Galaxy. It is expected that this data will allow the study of the properties of the galactic disk more accurately and reliability, helping...
Raul Michel Murillo
09/04/2015 - 14:30
Ionized gas in the CALIFA galaxies
We present here the most recent results we have obtained in our exploration of the gas abundances using the IFU data from the CALIFA survey. Using our own developed tools we have extracted the ionized gas properties of ~10.000 HII regions, in order to explore: (i) the relation between these properties and those of the host galaxies and the underlying stellar population; (ii) the local relation between the gas...
Sebastian Sanchez
26/03/2015 - 13:30
The Observatorio Astrofísico de Javalambre, with its 2 very wide field telescopes has been purposely built to conduct large scale surveys. The use of medium-narrow band filters, pioneered by the ALHAMBRA project, will produce a low resolution spectrum of every pixel in the sky. The first defined projects, J-PLUS@T80 and J-PAS@T250 are driven by the study of the nearby Universe and the study of dark energy...
Prof. Mariano Moles Villamate
12/03/2015 - 13:30
AirPlay Service
The Computer Center has launched a new service called AirPlay with aim of provide the users the projection of multimedia contents via wireless (WiFi). This will allow to make presentations from laptops or mobile devices without the need of any wiring connection, contributing greater ease and mobility to the speaker. In this seminar will explain the configuration and use procedures of the AirPlay service for devices with Android, iOS, OS X,...
Francisco Manuel Bayo Muñoz
05/03/2015 - 13:30
Understanding the obscuring torus and the nuclear star formation of AGN using GTC/CanariCam observations
The fueling of black holes occurring in active galactic nuclei (AGN) is fundamental to the evolution of galaxies. AGN themselves are largely explained in the context of a unified theory, by which a geometrically and optically thick torus of gas and dust obscures the AGN central engine. The torus intercepts a substantial amount of flux from the central engine and and reradiates it in the infrared. There are still many...
Almudena Alonso-Herrero
19/02/2015 - 13:30
Evolved stars are the factories of cosmic dust. This dust is made of tiny grains that are injected into the interstellar medium and plays a key role in the evolution of astronomical objects from galaxies to the  embryos of planets. However, the fundamental processes involved in dust formation and evolution are still a mystery. The aim of the NANOCOSMOS project is to take advantage of the new   ...
J. Cernicharo, C. Joblin & J.A. Gago
16/02/2015 - 13:30
Activity and Evolution of Oort Cloud Comets
Comets formed early in the evolution of the solar system while material was accreting to form planets. When proto-planets became large enough, a population of comets was dynamically ejected into the Oort cloud. Comets entering the inner solar system for the first time are called dynamically new comets. These objects have not been heated by the Sun and retain some of the most primordial material available for observation in the solar system...
Dr. Dennis Bodewits
11/12/2014 - 13:30
Structural properties of isolated galaxies
Distinct components of galaxies are products of internal and environmental processes throughout their lifetimes. Disentangling these processes is an important issue for understanding how galaxies form and evolve. In this context isolated galaxies represent a fruitful population to explore as they should be mainly affected by internal processes (minimal merger/accretion/tidal effects). I will present the structural analysis of a representative...
Mirian Fernández Lorenzo
04/12/2014 - 13:30
GLORIA: Global Robotic Intelligent Array for e-science
Dr. Alberto J. Castro-Tirado
04/12/2014 - 13:30
GLORIA: Global Robotic Intelligent Array for e-science
GLORIA is an FP7 project (UE-funded in 2011-14) hosted by 14 institutions (including several Spanish OPIs and Universities) based on a collaborative web 2.0 which allows to access 14 robotic telescopes worldwide with a diameter in the range 0.25-0.60 m. The goal is to grant the GLORIA users community (from citizens to amateur astronomers) participation in Citizen Science activities. To achieve this, experiments have...
Prof. Dr. Alberto J. Castro-Tirado
27/11/2014 - 13:30
Energetic transients as a part of time domain astronomy in TMT era
  Study of energetic cosmic explosions as a part of time domain astronomyis one of the key areas that could be pursued with upcoming Giant segmented optical-IR telescopes with a very large photon collecting area applying cutting edge technology. Existing 8-10m class telescopes have been helpful to improve our knowledge about Core-Collapse Supernovae, Gamma-ray Bursts and nature of their progenitors and explosion...
S. B. Pandey
24/11/2014 - 13:30
First results from SDSS IV - MaNGA
Large spectroscopic surveys of nearby galaxies (like the Sloan Digital Sky Survey) have shaped our understanding of galaxy evolution. However, to gain insight into the processes shaping the various galactic sub-components, a three-dimensional view (giving access to both spatial and spectral information) is necessary. In recent years, integral field spectroscopy (IFS) surveys of the nearby Universe (Sauron, CALIFA, Sami) are filling in this...
Francesco Belfiore
20/11/2014 - 13:00
An ALMA view on the compact obscured nuclei of luminous IR galaxies
Until recently, the study of the molecular interstellar medium of galaxies has been mostly focused on a few, relatively abundant, molecular species. Recent attempts at modeling the molecular emission of active galaxies have shown that standard high-density tracers do not provide univocal results and are not able to discriminate between different relevant environments (e.g., star-formation vs AGN). Spectral lines surveys allow us to explore...
Francesco Costagliola
13/11/2014 - 13:30
Unveiling the Massive Stars in the Galactic Centre
  Because of the proximity, the Galactic Centre is an unique lab for studies of the interplay between stars, ISM and super massive black holes in galactic nuclei. The central 200 pc of the Galactic Centre includes 4x10^7 molecular clouds and has a star formation  rate of ~0.03 M/yr. Three young, massive and compact star clusters were found and includes around 100 massive stars, which shape the nearby ISM. However, the...
Dr. Hui Dong
30/10/2014 - 13:30
The non-thermal universe at the highest energies: TeV gamma-ray astronomy with the MAGIC telescope
Some os the most violent processed in the universe present a non-thermal spectrum reaching energies of several tens of TeV. Due to the low fluxes at these energies, we need a technique capable to achieve collection areas of the order of the km^2. This can be reached by the Imaging Atmospheric Cherenkov technique and MAGIC is one of the main detectors for performing ground-based observations using this technique. It consists of two 17m...
Rubén López-Coto
22/10/2014 - 14:30
High Frequency Astrometry and Pulsar Studies with the Korean VLBI Network
Maria Rioja will report on the Korean VLBI Network (KVN), the first dedicated mm-VLBI array. The 3 telescopes have an innovative multifrequency receiver that allows for simultaneous observations at 22, 43, 86 &129GHz. With care these can be phase referenced to allow astrometry at these frequencies. I will show our first results of phase referencing at 132GHz and the path to compatible global VLBI. Richard Dodson will discuss a...
María Rioja and Richard Dodson
16/10/2014 - 14:30
The Fingerprint of a Galactic Nucleus: A Multi-Wavelength, High-Angular Resolution, Near Infrared Study of the Centre of the Milky Way
The centre of the Milky Way is the only galactic nucleus and the most extreme astrophysical environment that we can examine on scales of milli-parsecs. It is therefore a crucial laboratory for studying galactic nuclei and their role in the context of galaxy evolution. Yet, suitable data that would allow us to examine the stellar component of the Galactic Centre exist for less than 1% of its projected area. This ERC-funded research programme...
Dr. Rainer Schödel
15/10/2014 - 14:30
OCTOCAM: Proposal for a multichannel imager and spectrograph with high-time-resolution capabilities for the 8.1m Gemini telescopes
OCTOCAM is a multichannel imager and spectrograph that we will be proposing in the months to come for the 8.1m Gemini telescopes, in response to a call for feasibility studies of new instruments that has been recently opened. It will use dichroics to split the incoming light to obtain simultaneous observations in 8 different bands, from the ultraviolet to the near infrared. In its imaging mode, it will have a field of view of around 3'x3...
Dr. Antonio de Ugarte Postigo
24/09/2014 - 14:30
Metamateriales Quirales, el Plan B para la Refracción Negativa
  Metamateriales, más allá de los materiales, con este término se engloba una amplia variedad de materiales artificiales cuyas propiedades van más allá de las que nos proporciona la naturaleza. Mayor resistencia, extremada ligereza, propiedades exóticas o comportamientos anómalos ante la radiación son algunas de las características que estamos buscando. En esta charla...
Dr. Gregorio José Molina Cuberos
03/07/2014 - 14:30
'What is the progenitor system of the nearby Type Ia SN 2014J?'
  Type Ia supernovae (SNe Ia) are the thermonuclear explosive end-products of white dwarfs. SNe Ia are primary cosmological distance indicators and a major contributor to the chemical evolution of galaxies, yet we do not know what makes a SN Ia.   There are two basic families of models leading to a SN Ia, the single- degenerate model (SD) and the double-degenerate model (DD). In the SD scenario, a WD...
Dr. Miguel Ängel Pérez Torres
26/06/2014 - 14:30
The brief lives of massive stars as witnessed by interferometry
Massive stars present the newest and perhaps most challenging opportunity for long baseline interferometry to excel. Large distances require high angular resolution both to study the means of accreting enough mass in a short time and to split new-born multiples into their components for the determination of their fundamental parameters. Dust obscuration of young stellar objects require interferometry in the infrared, while post-...
Dr. Christian Hummel
24/06/2014 - 14:30
Remote sensing: survival strategies in the jungle of averaging kernels and covariance matrices
Outer space, stars, exoplanets, planets in the solar system, and even the Earth's middle and upper atmosphere have in common that it is inconvenient, expensive, and often technically unfeasible to make in situ measurements there. Remote sensing, e.g., by means of radiance measurements, is a relatively cheap and convenient alternative. The conversion of the measured radiances to the quantities of interest, e.g., temperature and composition...
Dr. Thomas von Clarmann
05/06/2014 - 14:30
Status of Astronomy in East Africa
Activities of astronomy  in East Africa are driven the East African Astronomical Society (EAAS)  supported mainly by the IAU/OAD.  A positive trend in the development of astronomy  activities in the region is  characterised by the  inclusion of astronomy into the curriculum at all levels, construction of astronomy observatories and research centres (e.g. Entoto Observatory -first light last week), opening new MSc...
Dr. Pheneas Nkundabakura
29/05/2014 - 14:30
IAA Computing Service
A cluster is defined as a collection of interconnected stand-alone workstations or PCs cooperatively working together as a single, integrated computing resource. Cluster Computing has become the paradigm of choice for executing large-scale science, engineering, and commercial applications. This is due to their low cost, high performance, availability of off-the-shelf hardware components and freely accessible software tools that that can be...
Rafael Parra
15/05/2014 - 14:30
Deep spectroscopy of planetary nebulae
In nebulae astrophysics, there are two long-standing discrepancies: 1) the ionic and elemental abundances of C, N, O, and Ne derived from optical recombination lines (ORLs) are systematically higher than those derived from collisionally excited lines (CELs); 2) the electron temperature derived from H I recombination continuum (e.g., Balmer jump at 3646 A) is always lower than that derived from CELs.  These two...
Dr. Xuan Fang
24/04/2014 - 14:30
Inconsistences in the harmonic analysis of time series
  The power of asteroseismology relies on the ability to infer the stellar structure from the unambiguous frequency identification of the correspoinding pulsation mode. Hence, the use of a Fourier transform is in the basis of asteroseismic studies. Nevertheless, the difficulties with the interpretation of the frequencies found in many stars lead us to reconsider Fourier analysis and the classical methods used to process time series...
Javier Pascual Granado
10/04/2014 - 14:30
Sculpting the Galactic Centre: Astrophysics and fundamental physics with photons and gravitational waves
Since 1993 we have known that the Galactic Center (GC) displays a core-like distribution of red giant branch (RGB) stars starting at ~ 1'', which poses a theoretical problem, because the GC should have formed a segregated cusp of old stars. I postulate that the reason for the missing stars in the RGB is closely intertwined with the formation of a formerly existing dense gas disk, an episode that removed the...
Dr. Pau Amaro-Seoane
08/04/2014 - 14:30
The IAA Cloud Service
  The rise in speed of communications and the decline in prices of storage elements, has caused we can put some of our information on the net in order to make it available easily from anywhere. In this sense, it is said that your information is hosted in the cloud. Nowadays, there are several software solutions to sync and sharing files on the cloud, like Dropbox, Google Drive or Sky Drive, among others. In the IAA, a cloud...
Francisco Manuel Bayo Muñoz and Juan José Guijarro Jiménez
03/04/2014 - 14:30
A ring system detected around the Centaur (10199) Chariklo
We will report observations of a multichord stellar occultation that revealed the presence of a ring system around the centaur object (10199) Chariklo. There are two dense rings,with respective widths of about 7 and 3 kilometres, optical depths of 0.4 and 0.06, and orbital radii of 391 and 405 kilometres. We will also present more results obtained after the occultation on June 3rd 2013. Photometric and spectroscopic...
Dr. Rene Duffard
27/03/2014 - 13:30
New findings on the X-ray emission from Wolf-Rayet nebulae
We present the most recent results of XMM-Newton and Chandra observations on the only four Wolf-Rayet (WR) nebulae observed to date. Given the limited number of observations and the different morphological and spectral characteristics of these nebulae, it has been difficult to understand the physics behind the plasma emission. Numerical and analytical models can not explain the 'soft' nature and low plasma temperatures (T~106 K)...
Jesús A. Toalá
20/03/2014 - 13:29
The Nature of the IR Emission in Low-Luminosity AGN at Parsec Scales
The vast majority of AGN belong to the low-luminosity class (LLAGN): they exhibit a low radiation efficiency (L/Ledd < 10^-3) and the absence of the big blue bump in their spectra, a signature of the accretion disk. The study of LLAGN is a complex task due to the contribution of the host galaxy, whose light outshines these faint nuclei. As a consequence, numerical models are usually compared with relatively poorly defined spectral energy...
Juan Antonio Fernández Ontiveros
13/03/2014 - 13:30
Quasars and their emission lines as cosmological probes
Quasars are the most luminous stable sources in the Universe. They are currently observed out to redshift z ~ 7 when the Universe was less than one tenth of its present age. Since their discovery 50 years ago astronomers have dreamed of using them as standard candles. Unfortunately quasars cover a very large range (8 dex) of luminosity making them far from standard. I briefly review several methods that can potentially exploit quasars...
Dr. Paola Marziani
06/03/2014 - 13:30
La Asociación de Mujeres Investigadoras y Tecnólogas (AMIT)
La incorporación de la mujer a la investigación, la docencia o la gestión de la Ciencia y las Humanidades supone un progreso social. La participación de las mujeres en estas esferas, sin embargo, no es igualitaria respecto a los hombres en la España de comienzos del siglo XXI. La presencia de la mujer es dramáticamente decreciente a medida que se sube en los escalones profesionales. AMIT es una...
J. Masegosa
20/02/2014 - 13:30
The AGN nature of LINER nuclear sources
The origin of the main excitation mechanisms in LINER (Low Ionization Emission Line Region) nuclei are still controversial, with nonstellar photoionization, fast shocks or hot stars as the principal candidates. In the AGN scenario, LINERs could represent the link between more powerful AGN and normal galaxies as suggested by their low X-ray luminosities. Their interest increases as they would be the dominant population of active...
Dr. I. Márquez
13/02/2014 - 13:30
A powerful new method to measure the atmospheric water vapour column.
We have developed a reliable powerful method to measure the atmospheric column of water vapour (PWV) down to very low levels. For this purpose we use and off-the-shelf cheap spectrometer to measure the equivalent width of the H2O bands at 940nm. In order to calibrate the measurements we use the radiative transfer model included in the package SCIATRAN to produce theoretical solar spectra as observed on the ground, based on simultaneous...
Prof. E. Pérez
06/02/2014 - 13:30
The bricks of the Very Large Telescope Interferometer
In this talk we will perform a review of the basic principles of the optical/near-infrared interferometry and of the current European facilities to use this observational technique. Particularly, we will describe the interferometric observables used at near-infrared wavelengths. We will provide a review of the current (and future) instruments available at the ESO Very Large Telescope Interferometer (VLTI), their advantages and limitations as...
Lic. Joel Sánchez Bermúdez
30/01/2014 - 13:30
The CHESS survey of the protostellar shock L1157-B1
Outflows generated by protostars heavily affect the kinematics and chemistry of the hosting molecular cloud due to strong shocks. These shocks heat and compress the ambient dense gas switching on a complex chemistry that leads to an enhancement of the abundance of several species, as reported in "chemically active" outflows, whose archetype is the outflow of the low-mass Class 0 protostar L1157. I'll present the results of...
Dr. Gemma Busquet
23/01/2014 - 13:30
Nucleosynthesis and molecular processes in evolved stars
Most of the stars (M < 8 solar masses) in the Universe end their lives with a phase of strong mass loss and experience thermal pulses (TP) on the Asymptotic Giant Branch (AGB), just before they form Planetary Nebulae (PNe). They are one of the main contributors to the enrichment of the interstellar medium and thus to the chemical evolution of galaxies. More specifically, the more massive AGB stars form very different isotopes (such as...
Dr. Anibal García Hernández
16/01/2014 - 13:30
Bar parameter evolution over the last 7 Gyr
The tumbling pattern of a bar is the main parameter characterising  its dynamics. This bar pattern speed, the bar ellipticity and its  length are the three observational parameters that fully characterize  bars. From numerical simulations, their evolution since bar formation  is tightly linked to the dark halo in which the bar is formed through  dynamical friction and angular momentum exchange. Observational ...
Dr. Isabel Pérez
05/12/2013 - 13:30
Stellar water fountains: planetary nebulae in the making
Planetary nebulae (PN) are one of the final phases in the evolution of low and intermediate mass stars (<8 Msun). They display a great variety of shapes, although in their previous phases (Asymptotic giant branch =AGB) they have a spherical geometry. The transition from spherical symmetry to asymmetry must occur during the short post-AGB phase or in the early PN phase. Here we present a special type of evolved stars, called "...
Dr. JFrancisco Gómez
28/11/2013 - 13:30
Galaxy clusters: galaxy laboratories and cosmological probes. A see you later seminar.
In this talk -my last one in the IAA for the moment- I will talk about the largest structures in the Universe: galaxy clusters. The first part of the talk will be focused on galaxy clusters embedded in the large scale structure: how we detect them and how we can use them to provide estimations of cosmological parameters. In the second part, I will talk about the galaxies living in clusters, in particular, about the brightest cluster...
Dr. Begoña Ascaso
07/11/2013 - 13:30
Proposing observations with the European VLBI Network
The European VLBI Network (EVN) is currently the most sensitive VLBI array in the world (its collecting area is about a hundred thousand square meters, or 1/10 of the planned Square Kilometer Array). I will give an overview of the EVN and the kind of science being done with this radio interferometric array, which essentially goes from Solar System studies up to quasars at high redshift. As a member of the EVN Programme Committee, I will...
Dr. Miguel Angel Pérez-Torres
31/10/2013 - 13:30
Digital Science: towards the executable paper
The science performed in Astronomy is digital science. This fact does not prevent the final outcome of an experiment is still difficult to reproduce. 
J. E. Ruiz
24/10/2013 - 14:30
AGN feedback and accretion in Perseus A
The Perseus Cluster is known as a famous observational example of (radio-mode) AGN feedback driven by the radio jet of the central galaxy Perseus A (NGC 1275, 3C 84). The feedback process is evident from observations of the intra-cluster medium showing X-ray bubbles filled with radio plasma. The radio jet generating these bubbles is powered by accretion onto the supermassive black hole in Perseus A. In this talk, I will present our results...
Dr. Julia Scharwächter
17/10/2013 - 14:30
The Martian ionosphere
The ionospheres of the planets (those regions with a significant fraction of free electrons and ions) provide interesting clues about the interaction of the solar radiation and the solar energetic particles with the planetary atmospheres.They can also be used to gain information about the density and temperature of the neutral upper atmospheres, a region that in the Martian case has traditionally eluded observation. In this talk I will sketch...
Dr. Francisco González Galindo
10/10/2013 - 14:30
Hot potatoes: the compact obscured nuclei of dusty IR galaxies
Evidence is now mounting that most of the activity in some luminous infrared galaxies takes place in their compact obscured nuclei (CONs), regions of less than 100~pc in diameter, which harbor large amounts of warm (T$>$100~K) molecular material (N(H$_2$)$>10^{24}$~cm$^{-2}$). The combined effect of warm, shielded gas and intense infrared radiation produce rich molecular spectra, which make these objects unique laboratories to study...
Dr. Francesco Costagliola
03/10/2013 - 14:30
Spectroscopy of the short GRB 130603B: The host galaxy and environment of a compact object merger
The nature of short duration gamma-ray bursts (GRBs) remains a central problem of modern astrophysics. They are thought to be related to the violent merger of compact objects, such as neutron stars or black holes, which would make them promising sources of gravitational waves. The absence of supernovae signatures clearly indicates that SGRB progenitors differ from their long duration cousins, but constraints to-date arise almost entirely from...
Dr. Antonio de Ugarte Postigo
26/09/2013 - 14:30
Main-Belt Comets
Since the discovery of 133P/Elst-Pizarro in 1996, an object moving in a typical Main Asteroid Belt orbit, but displaying a comet-like tail, nine more of those objects have been identified. They constitute a new class of small Solar System bodies, the ``missing link'' between asteroids and comets. Three of those objects fall into the ``disrupted asteroids'' subgroup, where the activity is suspected to be driven by either a...
Dr. Fernando Moreno
12/09/2013 - 14:30
Cosmological Simulations of Galaxy Formation
We present a suite of simulated galaxies, that match a wide range of scaling relations over a large mass range at z=0, and follow the evolution of these relations and confront them with observational constraints. We then make connections to "galactic archaeology" by examining the nature of the major structural components of the discs, highlighting that far and near field cosmology can be combined using these types of simulations. We...
Dr. Chris Brook
05/09/2013 - 14:30
SN 1993J and M81: a fruitful astrophysical collaboration
SN1993J, a powerful radio supernova high in the northern sky, has been monitored with VLBI though its lifetime. The VLBI observations have been phase-referenced to the core of M81. We will highlight the main results obtained: its extremely circular shell-like radio structure has expanded over 15 years in a rather self-similar way; the expansion is wavelength dependent, a result which can be mainly explained by a combination of a varying free-...
Prof. A. Alberdi
18/07/2013 - 14:30
Can we solve by solar magneto-seismology one of astrophysics great problems: Coronal heating enigma?
The latest satellite and ground-based observations have provided us a wealth of evidence of waves and oscillations present in the solar atmosphere from the low photosphere to the upper corona. Our understanding of the magnetically dominated structures and their dynamics in the solar atmosphere has been considerably enhanced in light of the latest high spatial and temporal resolution observations (e.g. DST/ROSA, IBIS, CoMP, SST/CRISP; SOHO,...
Prof. Robertus von Fay-Siebenberg
04/07/2013 - 14:30
The ALHAMBRA survey: First Data Release.
The ALHAMBRA (Advance Large Homogeneous Area Medium Band Redshift Astronomical; Moles et al. 2008) survey has observed 8 different regions of the sky, including sections of the COSMOS, DEEP2, ELAIS, GOODS-N, SDSS and Groth fields using a new photometric system with 20 contiguous, ~300A width, filters covering the optical range, plus deep JHKs imaging. The observations, carried out with the Calar Alto 3.5m telescope using the wide field...
Alberto Molino
27/06/2013 - 14:30
Dr. Sebastián Sánchez
20/06/2013 - 14:30
El Universo de Planck
Recientemente se han presentado los resultados cosmológicos de la misión espacial Planck. Es un buen momento para poner al día el valor de los parámetros del Universo. La nueva composición se resume en 26.8% materia oscura, 4.9% materia visible, 68.3% energía oscura. El valor de la constante de Hubble ha resultado también muy inferior a lo esperado: 67.5 km/(s Mpc). La conclusión m...
Prof. E. Battaner
13/06/2013 - 14:30
Love for Science or 'Academic Prostitution'?
Note: This is a seminar given at the European Research Council Headquarter some weeks ago. It was focused on the expected audience, members of the ERC directly involved in setting the rules for Grants evaluation and/or participate in all steps of the process, mainly Scientific Officers, but also Agency staff. I have decided to present the talk as it was presented there. Abstract: In a recent Special issue of Nature concerning Science...
Dr. Lourdes Verdes-Montenegro
06/06/2013 - 14:30
PAH's in Titan's Upper Atmosphere
Observations of Titan's atmosphere made with the VIMS instrument on board the Cassini satellite show a strong limb emission around 3.3 µm at high atmospheric altitudes (above 700 km). This emission exhibits the typical spectral signatures of the strong CH4 bands. A detailed analysis of the spectra reveals, however, an additional strong emission centered at 3.28 µm and peaking at about 950 km. We have untangled this spectral...
Prof. Manuel López-Puertas
23/05/2013 - 14:30
Extreme emission-line galaxies: New light on the mass assembly and chemical enrichment of low-mass galaxies
Galaxies showing early and significant stages of mass assembling are key objects for understanding galaxy evolution. However, young starbursts like these are extremely rare in the local Universe. In this context, a unique population of compact, low-mass galaxies forming stars at unusually high rates - also known as the "green peas" - emerge now as ideal laboratories to study the details of massive star formation, feedback and...
Dr. R. Amorin
16/05/2013 - 14:30
Hall motions and star escape in galactic dynamics in the Hill approach
The motion of a galactic cluster is approximately described by those equations in a co-moving frame, introduced by Hill in the XIXth century. Individual motions can only studied numerically, but  for the center of mass interstellar gravitational forces drop out and one is left with a simply system analogous to those considered by Hall for a planar electron in crossed electric and magnetic fields. In both cases, the motion of the COM is...
Dr. P. Horvathy
09/05/2013 - 14:30
The IAA COsmic DUst LABoratory, a lab next door (building).
MAIN GOALS of this talk: 1. Let you know/remind you that the IAA has a worldwide reference light scattering laboratory for experimentally studying the angular dependence of the scattering matrices of dust samples of astrophysical interest. 2. Convince the audience of: - Polarization is highly valuable tool for retrieving information on the physical properties of small cosmic dust particles. - How useful laboratory measurements...
Dr. O. Muñoz
25/04/2013 - 14:30
X-raying born-again planetary nebulae
Planetary nebulae have been a addition to the zoo of X-ray-emitting sources. Here I present results on a the very particular class of born-again planetary nebulae, those whose central star has experienced a helium shell flash during the lifetime of the planetary nebula. The interaction of the fast stellar wind of the central star with hydrogen-poor material ejected during the born-again episode provides a unique case to study...
Dr. M. Guerrero
18/04/2013 - 14:30
The Shortest-Known–Period Star Orbiting Our Galaxy’s Supermassive Black Hole
Stars with short orbital periods  at the centre of our Galaxy offer a powerful and unique probe of the nearest supermassive black hole. Observing these stars is a long-term astrophysical experiment that has been going on for two decades. In this talk I will outline this project and discuss the observational challenges and the strategies to overcome them. Steady technological and methodological advances allow us to improve...
Dr. Rainer Schoedel
11/04/2013 - 14:30
CALIFA: The spatially resolved Star Formation History of Galaxies
The Calar Alto Legacy Integral Field Area (CALIFA) is an ongoing 3D spectroscopic survey of 600 nearby galaxies of all kinds. This pioneer survey is providing valuable clues on how galaxies form and evolve. Processed through spectral synthesis techniques, CALIFA datacubes allow us to, for the first time, spatially resolve the star formation history of galaxies spread across the color-magnitude diagram. The richness of this approach is already...
Dr. R. González Delgado
04/04/2013 - 14:30
Probing Galaxy-Scale Halos and Large-Scale Structure with Weak Gravitational Lensing
The presence of dark matter in the Universe is well-established and contributes significantly to structures ranging from galaxies to superclusters. However, the details of the connection between luminous galaxies and the dark matter halos in which they reside are not particularly well-characterised. Weak gravitational lensing is the only direct probe that can measure the total mass profile associated with galaxies over a wide range of radii...
Dr. Ami Choi
21/03/2013 - 13:30
The Javalambre-PAU Astrophysical Survey
  The Javalambre-PAU Astrophysical Survey (J-PAS) is a very wide field Cosmological Survey to be carried out from the Javalambre Observatory in Spain with a purpose-built, dedicated 2.5m telescope, using a set of 54 narrow band and 5 broad band filters over a 1.3Gpix, 5deg2 FOV camera. Starting in early 2015,  J-PAS will image 8500deg2 of Northern Sky and obtain 0.003(1 + z) precision photometric...
Dr. N. Benitez
14/03/2013 - 13:30
Towards a general classification of atmospheric waves on Venus
The atmospheric superrotation of Venus goes on being a puzzling phenomenon in the Solar system and is still considered an open problem in geophysicalfluid dynamics. A general agreement exists among numerous works concerning the main role that atmospheric waves should have in the generation and maintenance of the superrotation, although most of them try to study the impact of the waves with complex GCMs or using adapted terrestrial dispersion...
Dr. Javier Peralta Calvillo
06/03/2013 - 13:30
Hot Intergalactic Gas in Clusters of Galaxies
Clusters of galaxies are the most massive objects in our Universe. Each of them contains dark matter, thousands of galaxies and is filled with hot intergalactic gas radiating in X-rays. Unusual method to detect clusters of galaxies is possible due to presence of extremely isotropic Cosmic Microwave Background Radiation (CMB) filling our Universe. Interaction of hot electrons with CMB photons changes the CMB spectrum in the...
Prof. Rashid Sunyaev
27/02/2013 - 13:30
Mysteries and Discoveries from the Chandra Planetary Nebulae Suvery (ChanPlaNS)
Chandra observations of planetary nebulae (PNe) have ushered in a new wave of discoveries and mysteries in this class of evolved stars. The X-ray emission from PNe comes in two flavors: compact sources in the vicinity of the central star and extended sources that fill the nebular cavities generated during the PN formation process. The latter variety, called hot bubbles, are chemically-enriched with helium shell burning products (C, O, and Ne...
Dr. Rodolfo Montez
21/02/2013 - 13:30
Local tadpole galaxies and cold-flows
Extremely metal poor galaxies are primitive objects attending to their chemical evolution. For reasons not well understood, they tend to have cometary or 'tadpole' morphology, with a bright peripheral clump ('the head') on a faint tail. Tadpole galaxies are rare in the nearby universe but turn out to be very common at high redshift, where they are usually interpreted as disk galaxies in early stages of assembling. If this...
Dr. Jorge Sánchez Almeida
14/02/2013 - 13:30
Our Central Organization: Structure and Duties
More than 130 research centres and institutes, the IAA among them, belong to the Spanish Research Council (CSIC). The management of the Council is carried out by the Central Organization, in Madrid. With this talk I want to give an overview of the structure of our Central Organization and of the duties of its members.
Matilde Fernández Hernández
07/02/2013 - 13:30
Bajo un mismo cielo
"Bajo un mismo cielo” (“Under the same sky”) tells the story of the trip undertaken in 2009 by GalileoMobile. In a road trip that lasted two months and traveled around seven thousand kilometers, GalileoMobile visited schools and communities in Chile, Bolivia, and Peru to perform science activities and organize astronomical observations. Through children's eyes, an encounter from different visions and...
William Schoenell
31/01/2013 - 13:30
IAA: its Structure, Failures and Potential
In this talk I will first show the structure of our Institute, the task division and the people responsible for these taks. I will also analyse all the procedures, customs and usages that drift us apart from the dream IAA. Finally, I will make some remarks about the (underestimated? disregarded?) potential of our Institute.
Matilde Fernández Hernández
24/01/2013 - 13:30
Magnetic Effects and ovsersized M Dwarfs in the Young Open Cluster NGC 2516
By combining rotation periods with spectroscopic determinations of projected rotation velocity, Jackson, Jeffries & Maxted (2009) have found that the mean radii for low-mass M-dwarfs in the young, open cluster NGC 2516 are larger than model predictions at a given absolute I magnitude or I - K color and also larger than measured radii of magnetically inactive M-dwarfs. The relative radius difference is correlated with magnitude, increasing...
James MacDonald
17/01/2013 - 13:30
Results from a stellar occultation by the dwarf planet Makemake
Pluto and Eris are icy dwarf planets with nearly identical accurately measured sizes, comparable densities, and similar surface compositions. Their different albedos and current distances from the Sun are likely reasons why Pluto possesses an atmosphere whereas Eris does not. Makemake, another icy dwarf planet with a similar spectrum to Eris and Pluto is currently at intermediate distance to the Sun between the two. Makemake’s size and...
José Luis Ortiz
13/12/2012 - 18:00
The P91 ESO OPC Meeting - What Matters in an ESO Proposal
I will give a brief summary of information obtained during my participation in the 91st meeting of the ESO Observing Programmes Committee, including the current and future availability of ESO instruments and telescopes and pending changes in ESO instrumentation. I will also briefly explain the proposal evaluation procedure and give you some tipps on how to write proposals for ESO time.
Rainer Schoedel
29/11/2012 - 13:30
Searches for young stars in the central region of our Galaxy
Star formation processes at the Galactic Center (GC) could differ significantly from the rest of the Milky Way because of factors like the high pressure and turbulence of the ISM, strong magnetic fields, and the presence of the supermassive black hole (SMBH). Understanding star formation in this region is interesting not only in it own right, but also as a  template for other galactic nuclei. Here I present results of three different...
Shogo Nishiyama
26/10/2012 - 14:00
QSO outflows
The study of AGN feedback processes on the evolution of their host galaxies and their environments is a field of growing importance in the past years. One of the feedback mechanisms identified is high-velocity outflows in QSOs. In this talk, some results are presented based on observations of several QSOs, aimed to determine the importance of these outflows as feedback mechanisms.
J.Ignacio González Serrano
18/10/2012 - 14:30
Cosmological Challenges of Dwarf Galaxies
A prime challenge to our understanding of galaxy formation concerns the scarcity of dwarf galaxies compared with the numerous low-mass halos expected in the current ΛCDM paradigm. This is usually accounted for by assuming that energetic feedback from evolving stars confines dwarf galaxy formation to relatively massive halos spanning a narrow mass range. I will highlight a number of observations that may be used to test this assumption...
Julio Navarro
04/10/2012 - 14:30
Hydrodynamical Models of Core-Collapse Supernovae
A set of hydrodynamical models applied to stellar evolutionary progenitors is used to study the nature of core-collapse supernovae (SNe).  For the type IIb SN 2011dh, our modeling suggests that a large progenitor star---with R ~200 R_sol--- is needed to reproduce the early light curves. This is consistent with the suggestion that a yellow super-giant star detected at the location of the SN in deep pre-explosion images is the progenitor...
Melina Bersten
27/09/2012 - 14:30
ASTRONET, a comprehensive long-term planning for the development of European astronomy
ASTRONET was created by a group of European funding agencies, including the Spanish ministry, in order to establish a strategic planning mechanism for all of European astronomy. It covers the whole astronomical domain, from the Sun and Solar System to the limits of the observable Universe, and from radioastronomy to gamma-rays and particles, on the ground as well as in space. ASTRONET aims to engage all astronomical communities...
Jesús Gallego
19/07/2012 - 14:00
A deeper look on thick discs using data from the Spitzer Survey of Stellar Structure in Galaxies (S4G)
Thick discs are disc-like components with a scale height larger than that of the classical discs. They are  most easily detected in close to edge-on galaxies in which they appear as a roughly exponential excess of light which appears a few thin disc scale heights above the midplane. Their origin has been considered mysterious until recently and several formation theories have been proposed. Unveiling the origin of thick discs is...
Sébastien Comerón
13/07/2012 - 14:00
Jets de Estrellas Jóvenes: Teoría
En los últimos años ha habido un gran esfuerzo en la construcción de modelos teóricos que nos permitan entender y explicar distintos aspectos de los jets producidos por estrellas en su vida temprana. Algunos de estos aspectos son: su mecanismo de producción y colimación, la generación de nudos en su interior y la interacción con el medio circundante. En este trabajo se...
Jorge Cantó
05/07/2012 - 14:00
Infraestructuras de cálculo en el Instituto de Astrofísica de Andalucía (IAA): pasado, presente y futuro.
Actualmente el IAA dispone de una gran infraestructura de cálculo, la conocida Sala Grid, que alberga 32 nodos IBM x3950M2 con un total de 128 procesadores Intel Xeon Quad Core 2.93GHz (512 cores), 4 TeraBytes de memoria RAM, y una capacidad de almacenamiento total de 315 TeraBytes, todo ello interconectado con tecnología de red Infiniband a 20Gbps. Hasta ahora esta infraestructura se ha utilizado dentro del marco del...
José Ramón Rodón
21/06/2012 - 14:00
The AGN-Starburst connection in nearby (U)LIRGs: a radio view
I review the main results obtained by our team in the last few years, on studies of nearby Luminous and Ultra-Luminous Infrared Galaxies (LIRGs and ULIRGs, respectively). These galaxies are expected to form stars at rates as large as (10-100) Msolar/yr, or even higher, and constitute excellent laboratories for studies of star-formation. They are also expected to be bright at radio wavelengths.  Among other results, I will present...
Miguel Ángel Pérez Torres
14/06/2012 - 14:00
Holographic imaging of dense fields: the amazing poor man's MCAO
Being able to image large fields at the diffraction limit of large telescopes is one of Astronomy's  oldest dreams. The standard way toward achieving this goal is to throw lots of money at it and build ever more sophisticated adaptive optics (AO) systems. As an alternative way, I present an algorithm for speckle holography that has been optimised for diffraction limited imaging of crowded fields.  I will present the exciting...
Rainer Schoedel
31/05/2012 - 14:00
Nitrogen is one of the most abundant metals in the ISM and thus emitting strong emission-lines in the optical spectrum of ionized gaseous nebulae. Its nucleosynthetic origin is quite different to that of oxygen as it is produced both by massive stars and by intermediate- and low-mass stars. Thus, the study of the nitrogen-to -oxygen ratio by means of especially defined strong-line methods offers a powerful tool to inspect with...
Enrique Pérez Montero
24/05/2012 - 14:00
Development of a miniaturized real time attitude controller for micro and nanosatellites
In last years low cost space missions have become an instrument for many research institutes to test new technologies and perform low-orbit Earth science using commercial components. Cubesat represent the most popular standard for microsatellites, but due to low cost components and reduced size, there are no complete attitude controllers available for the smallest versions. This talk will describe the development of a control system...
Gian Paolo Candini
17/05/2012 - 14:00
Ice Rocks in the Solar System
The study of the minor bodies in the Solar System has historically been a major source of information. The term "Minor Body" covers objects exhibiting very different dynamical and compositional characteristics, in fact, every object in the Solar System that is not a planet or a star, is a minor body. All these objects share a common link, they were the building blocks of the Solar System that we observe today and are considered to...
Noemi Pinilla Alonso
10/05/2012 - 14:00
The thirteen billion year history of the most massive black holes
Super-massive black holes (BHs) that are found in the centers of most galaxies started their growth when the universe was about 300 million years old. Some of these "seed black holes" were probably the remnants of the earliest stars. The largest BHs, that are some 10^10 times more massive than the sun, accumulated most of their mass during the first 3 billion years after the big bang. The less massive ones are still growing today. I...
Hagai Netzer
03/05/2012 - 13:00
Detecting substructure in the galactic stellar halo with Gaia
We present a Gaia mock catalogue we have created to test various approaches to detect the presence of past mergers in the Galactic halo. We propose an extension of the great circle cell method of Johnston et al. (1996), which is optimized to identify tidal debris along great circles in the sky. We have added the proper motion information that will be supplied by Gaia to add a kinematical restriction to the original method. We test our...
Luis A. Aguilar
26/04/2012 - 14:00
The Hubble Space Telescope's Wide Field Camera 3
The Wide Field Camera 3 (WFC3) was installed in 2009 and is now the primary science instrument on HST. Under development since 1998, WFC3 expanded Hubble's ultraviolet and infrared imaging capabilities by factors of more than 20. WFC3 also provides an unparalleled capability for low resolution infrared spectroscopy of very faint sources. This talk will discuss the scientific goals for WFC3, its basic design and technological...
John Mackenty
12/04/2012 - 14:00
Oxygen in the Universe: a historic introduction
We briefly review the main steps that led to the discovery of oxygen in the Universe and to the understanding of its  production and cosmic evolution. We highlight some of the problems that still need an explanation.
Grażyna Stasińska
28/03/2012 - 14:00
A new golden age in Spanish Astronomy: the GTC
Spanish Astronomy  has experienced a great development during the last 20-30 years, which can be, in part, associated to the available technological resources.  Extragalactic astronomy  started in Spain due to the agreement  for the development of the Observatory of the Roque de los Muchachos, with the installation of the INT 2.5m and WHT 4.2m telescopes and their associated instrumentation.  Of course the CAHA...
Josefa Masegosa
15/03/2012 - 13:00
What can we learn from gamma-ray anisotropies?
Over the last two decades the study of angular anisotropies provided a huge amount of information, when used to analyze the Cosmic Microwave Radiation. The same approach can be extended also to higher energies, studying angular fluctuations in the gamma-ray emission. In this talk I will refer in particular to the data of the Fermi-LAT telescope that has recently presented its measurement of the angular power spectrum (APS) of anisotropies at...
Mattia Fornasa
05/03/2012 - 13:00
MIRADAS: The Next-Generation Infrared Spectrograph for the GTC
MIRADAS is a near-infrared multi-object R=20,000 echelle spectrograph for the 10.4-meter Gran Telescopio Canarias. It is the most powerful astronomical instrument of its kind ever envisioned, with an observing efficiency more than an order of magnitude greater than current capabilities for 10-meter-class telescopes. The (still-growing) MIRADAS science team includes more than 40 scientists from 8 institutions in the GTC community. In this talk...
Stephen Eikenberry
23/02/2012 - 13:00
Seeking and Mocking Non-thermal Emission in Galaxy Clusters
Diffuse synchrotron radio emission is observed in many clusters of galaxies probing the presence of high energy cosmic ray (CR) electrons. This emission can be explained by the hadronic model where the electron population originates from the interactions between CR protons and the cluster ambient gas. Additionally, a very high energy gamma-ray emission is also expected. I will briefly review the current knowledge on the non-thermal emission...
Fabio Zandanel
16/02/2012 - 13:00
Modelos teóricos de las nebulosas de Eta Carinae
En esta plática se presentan modelos teóricos de los eventos eruptivos de 1840 (la gran erupción) y de 1890 (la menor erupción) de la estrella masiva Eta Car. Las nebulosas bipolares en torno a la estrella se formaron de la interacción del material eyectado durante estas erupciones con el viento estándar de la estrella. En nuestros modelos, se supone un escenario de colisión de...
Ricardo Francisco González Domínguez
02/02/2012 - 13:00
Efectos de los cúmulos ionizantes de baja masa en el espectro de regiones HII y galaxias
En este seminario presentaré mi trabajo de tesis sobre el modelado del espectro de líneas de emisión de regiones H II y galaxias con formación estelar. Primero hablaré sobre la influencia de los efectos de muestreo de la función inicial de masas estelares (IMF)  en el continuo ionizante de los cúmulos y en el espectro de regiones H II,  centrando la atención en los cú...
Marcos Villaverde
26/01/2012 - 13:00
Maser emission in evolved stars: from AGB to PNe
I will present a review of maser emission in evolved stars from the asymptotic giant branch (AGB) to planetary nebulae (PNe). The circumstellar envelopes of oxygen-rich evolved stars provide optimal conditions to pump different species of masers, emitting at radio wavelengths. Interferometric observations of masers are a powerful tool to study with the highest angular resolution the molecular gas around evolved stars, because...
Lucero Uscanga Aguilera
19/01/2012 - 13:00
Dwarf galaxies as dark matter laboratories
Dwarf spheroidal galaxies are key objects in the current cosmological paradigm: first, they are the least luminous galaxies, likely signaling the minimum halo mass at which gas can be accreted and converted into stars. Second, they all have ancient stellar populations, providing clues on star formation/feedback processes at early stages of the Universe. Third, they are the most numerous satellites about the Milky Way and M31,...
Jorge Peñarrubia
17/01/2012 - 13:30
Albedo and atmospheric constraints of dwarf planet Makemake from a stellar occultation
Makemake is an icy dwarf planet with a spectrum similar to Eris and Pluto, and is currently at a distance to the Sun intermediate between the two. Although Makemake’s size (1,420 ± 60 km) and albedo are roughly known, there has been no constraint on its density and there were expectations that it could have a Pluto-like atmosphere. Here we report the results from a stellar occultation by Makemake on 2011...
José Luis Ortiz
12/01/2012 - 13:00
Everything you always wanted to know about extinction but were afraid to ask
Twenty two years ago Cardelli et al. published their seminal paper on Galactic extinction laws. In the first part of my talk I will explore that (often quoted but also often misunderstood) paper and detail its strengths and weaknesses. In the second part I will describe the two datasets that have finally allowed the Cardelli et al. laws to be tested to their limit and I will present a new family of extinction laws derived from the new data...
Jesús Maíz Apellániz
10/01/2012 - 13:30
IAA: its structure, failures, and potential
 In this talk I will first show the structure of our Institute, the task division and the people responsible for these taks. I will also analyse all the procedures, customs and usages that drift us apart from the dream IAA. Finally, I will make some remarks about the (underestimated? disregarded?) potential of our Institute.
Matilde Fernández Hernández
22/12/2011 - 12:34
Dynamical Modeling of Luminous Infrared Galaxy Mergers
It is widely accepted that galaxy mergers can have a significant effect on galaxy properties and may be an important part of galaxy evolution. Enhanced star formation is one frequently observed property of (gas rich) mergers and theoretical prescriptions for star formation can generally reproduce the observed behavior. However a detailed study comparison of these prescriptions with individual galaxy merger events has not been...
George C. Privon
15/12/2011 - 13:00
X-ray properties of nearby luminous infrared galaxies
I present results of X-ray observations of a complete sample of luminous infrared galaxies (LIRGs) from the GOALS, a multi-wavelength project to study the most luminous IR-selected galaxies in the local Universe. X-ray imaging at an arc-second resolution obtained with the Chandra X-ray Observatory provides locations of an active nucleus, if present, and extended morphology of starburst-driven winds in those LIRGs. An inspection of their X-ray...
Kazushi Iwasawa
01/12/2011 - 13:00
Mass, metallicity and SFR relationships in star forming galaxies using deep surveys
To understand the formation and evolution of galaxies, it is important to have a full comprehension of the role played by Metallicity, Star Formation Rate (SFR), and stellar mass of galaxies. The interplay of these parameters at different redshifts will substantially affect the evolution of galaxies and, as a consequence, the evolution of these parameters provides important constraints for the galaxy evolution models. We studied the...
Maritza A. Lara-Lopez
24/11/2011 - 13:00
The Bayesian Galaxy Cluster Finder and its Application to Large Surveys
One of the main purposes of Large Surveys is the study of galaxy clusters. However, it is not an easy task to compile a complete sample. In this talk, I will present a new technique for detecting galaxy clusters called the Bayesian Cluster Finder (BCF) which is able to determine the position, redshift and richness of clusters in any survey. I will introduce the simulations that we performed to test the algorithm through realistic mock galaxy...
Begoña Ascaso
17/11/2011 - 13:00
Revealing the hidden supernova population in luminous infrared galaxies
A substantial fraction of star formation (SF) and hence of the core-collapse supernovae (CCSNe) in the Universe is hidden behind dust. At higher-z obscured star formation in luminous and ultraluminous infrared galaxies (LIRGs and ULIRGs) actually dominates over SF seen in the UV and optical. These same objects are expected to hide in their nuclear regions large numbers of undetected CCSNe. In this talk I describe our ongoing efforts using...
Seppo Mattila
03/11/2011 - 13:00
Gamma-Ray-Bursts, High-Energy-Cosmic-Rays and Beam-Plasma Instabilities
Gamma-Ray-Bursts and High-Energy-Cosmic-Rays are two of the most intriguing enigmas of astrophysics. A promising scenario solving both problems consists in the Fermi-like acceleration of particles by relativistic collisionless shocks. These shocks could generate the Gamma Burst together with some highly energetic cosmic rays, in the earlier phase of a Supernovae explosion. Later on, the  Supernovae Remnant could still accelerate cosmic...
Antoine Bret
27/10/2011 - 14:00
Locating the gamma-ray emission region in AGN from multi-messenger observations
Relativistic jets in AGN, in general, and in blazars, in particular, are among the most energetic and powerful astrophysical phenomena known so far. Their relativistic nature provides them with the ability to emit profusely at all spectral ranges from radio wavelengths to gamma-rays. They display extreme variability at all time scales (from hours to years). Since the birth of gamma-ray astronomy, locating the origin of gamma-ray emission has...
Iván Agudo
20/10/2011 - 14:00
Mapping star-formation in the Milky Way
In the last few years, it has become possible to measure the distance and the velocity vector of young stars located within 500 pc of the Sun with an accuracy of order 1% using Very Long Baseline Interferometry (VLBI) techniques. This represents an improvement by more than 1 order of magnitude over what was previously possible, and opens the door to some extremely high accuracy astrophysics. In particular, theoretical pre-main sequence...
Laurent Loinard
22/09/2011 - 14:00
Early r-process enrichment in the halo: Process and implications/The future role of the Nordic Optical Telescope
I: Early r-process enrichment in the halo: Process and implications Current thinking suggests that the outer Galactic halo formed first, with stars dominated by fresh C(NO) elements, but soon with increasing amounts of heavier elements. The now appreciable sample of extremely metal-poor (EMP) stars with [Fe/H] ~ -3 trace the transition to this chemically more diversified regime. A small fraction of these EMP giants contain r-process...
Johannes Andersen
16/09/2011 - 13:00
Early Planet Formation from an Experimentalist’s Point of View
Planet formation starts in gaseous protoplanetary disks. Small grains move around, collide, stick together and grow. However, many collisional roads also lead to destruction of larger bodies. Which ones are prevailing and if this is the basic way to planet formation is still an open question, but there are modes to grow particles to larger size even in ‘high speed’ collisions. This talk will also touch upon processes of transport...
Prof. Gerhard Wurm
07/07/2011 - 14:00
Coagulation, restructuring and fragmentation of dust grains in the protoplanetary disks: first stages of Solar System formation
The understanding of the formation of the planetary systems is one of the main topics of modern astrophysics and its study requires a synergetic effort of observations, laboratory experiments and theoretical models. It is generally accepted that planets originate in the dust disk that remains around a star after its formation (protoplanetary disk). Nevertheless there are no clear ideas on the physical conditions that are required, neither on...
Walter Sabolo
30/06/2011 - 14:00
Quasi-periodicities in the periodograms of Corot Delta Scuti stars
Periodic patterns are not expected to be found in the frequency spectra of delta-Scuti stars, as in solar-like pulsators. However, some efforts have been carried out in order to find any signal of periodicity in this type of stars (Handler et al., 1997; Breger et al., 1999, 2009). These works used ground-base observations and the results have not been conclusive. In our study we have used data from CoRoT of two delta-Scuti stars poorly known. We...
Antonio García Hernández
20/06/2011 - 14:00
Simulation of Relativistic Jets with Macroscopic and Microscopic Processes and Associated Self-consistent Radiation
Relativistic jets are ubiquitous in astrophysical systems. In this talk I will present recent research results from RMHD simulations designed to study the CD kink instability of relativistic jets and the magnetic field amplification that occurs in relativistic shocks in an inhomogeneous medium. I will then present the results of RPIC simulations of particle acceleration in relativistic shocks and self-consistent calculation of the radiation at...
Ken Nishikawa
16/06/2011 - 14:00
Time-Dependent Hamiltonians in Quantum Mechanics and Inflationary Cosmology
We revise the problem which appears in Quantum Mechanics when the Hamiltonian depends explicitly on time and provide a general setting to address such quantum systems. As a paradigmatic example we analyse the case of the damped harmonic oscillator (satisfying the Caldirola-Kanai equation) and extend the system to accomodate the ordinary time translation as a true symmetry (Bateman dual system). This general scheme applies in particular to the...
Julio Guerrero García
07/06/2011 - 14:00
EST: a large solar telescope for the XXI century
The European Solar Telescope (EST) is a project for a 4-meter class telescope to be located in the Canary Islands. It is promoted by the European Association for Solar Telescopes (EAST). This is a consortium formed by a number of research organizations from fifteen European countries (Austria, Croatia, Czech Republic, France, Germany, Hungary, Italy, the Netherlands, Norway, Poland, Slovak Republic, Spain, Sweden, Switzerland, and United...
Manolo Collados
02/06/2011 - 14:00
Coronal heating on the Sun: new observations and “realistic” 3D numerical models
The heating of the solar corona is a long standing problem of solar physics, in fact dating back to the time when it was first discovered that the corona was quite hot. In short, the question is how one can find a credible physical mechanism to transport and dissipate a small fraction of the “mechanical” energy contained in the convection zone in(to) the corona. Amusingly, most answers to the question date back to the late 1940...
Prof. Viggo Hansteen
31/05/2011 - 14:00
Dark Matter and Stars
Under the assumption that Dark Matter (DM) is composed of Weakly Interacting Massive Particles (WIMPs), it can affect the properties of stars. In the local Universe effects are feeble, nonetheless they can in principle be used in order to pose constraints on the nature of DM particles with observations of the Sun, and of compact objects at the Galactic Center, in Globular Clusters and in White Dwarf Galaxies. The first generation of stars to...
Fabio Iocco
26/05/2011 - 14:00
The BigBOSS dark energy experiment
The BigBOSS experiment is a project designed to unlock the mystery of dark energy using existing ground-based facilities operated by National Optical Astronomy Observatory (NOAO). A new 5000-fiber R=5000 spectrograph covering a 3-degree diameter field will measure clustering properties in the distribution of galaxies and hydrogen gas spanning redshifts from 0.2 < z <3.5. This project will enable an unprecedent multi-object spectroscopic...
F. Prada & M. Azzaro
12/05/2011 - 14:00
ALMA Early Science
Stéphane Léon
05/05/2011 - 14:00
Gamma-ray Bursts - what kind of stars do they come from?
Long GRBs are the most luminous objects in the universe and mark the collapse of a very massive star, usually accompanied by a relativistic supernova. Their large distances do not allow us to directly identify the progenitor star as we were able to do with some type of supernova. We therefore rely on indirect methods to derive some information on the kind of progenitor star or system and what makes a massive star to explode in a supernova or...
Christina Thoene
28/04/2011 - 14:00
The connection between missing stellar cusps in galactic nuclei and general relativity
One of the most interesting sources of gravitational waves is the inspiral of compact objects on to a massive black hole (MBH), commonly referred to as an extreme-mass ratio inspiral. The small object, typically a stellar black hole, emits significant amounts of GW along each orbit in the detector bandwidth. On the other hand, recent observations of the Galactic center revealed a dearth of giant stars inside the inner parsec relative to the...
Pau Amaro Seoane
14/04/2011 - 14:00
Discos de acreción alrededor de protoestrellas de masa alta e intermedia
Las observaciones directas, que resuelvan angularmente los discos de acreción en torno a estrellas jóvenes de masa alta e intermedia son escasas. Presentaré los resultados de nuevas observaciones radiointerferométricas de alta resolución angular que, junto con nuestros modelos teóricos, revelan la presencia de discos de acreción en torno a dos estrellas en formación. En el caso de la...
Mayra Osorio
24/03/2011 - 13:00
The dirty side of astronomy: carbonaceous dust
Since the beginning of modern astronomy, dust has always been considered an obstacle on the path to understanding both nearby and far away phenomena. In this talk I will explain briefly the origin and the life-cycle of carbonaceous dust, introduce to new discoveries and old puzzles and eventually show how dust can be used as a powerful astronomical tool.  
Alessandra Candian
22/03/2011 - 13:00
Analysis of chemical and dynamical processes in the Earth's Atmosphere with MIPAS data
MIPAS is a Fourier transform limb emission mid-infrared spectrometer in Earth orbit. It provides spectrally resolved radiance profiles in the 4.15 to 14.6 mum spectral region from about 5 km up to 70 km (in its nominal mode) and up to 150 km in special observation modes. At IMK and IAA, we retrieve temperature and the distributions of up to 30 trace species from these data, which then are used to study chemistry and dynamics of the atmosphere...
Gabi Stiller
17/03/2011 - 13:00
Star formation at high-z: a stacking approach applied to mm-data
Star formation is a key ingredient of the formation and evolution of galaxies. The associated dust emission has been observed up to very high-z. At mm wavelengths, this can be done thanks to the negative k-correction, which compensates the increasing luminosity distance. However, only the brightest sources can be detected with the present instruments, even with the early ALMA capabilities. Here we present a routine to perform stacking analysis...
Roberto Decarli
10/03/2011 - 13:00
El Centro Astronómico Hispano-Alemán: 2014-2018 y más allá
El Observatorio de Calar Alto cuenta en estos momentos con tres telescopios opticos-infrarrojos y un conjunto de 11 instrumentos que cubren un gran rango de necesidades en distintos campos científicos, con una demanda desigual por parte de la comunidad astronómica. Comenzando con los datos adquiridos durante segundo semestre del 2010, a lo largo del 2011 se procederá a la apertura del archivo público del observatorio, con el objetivo de...
David Barrado
03/03/2011 - 13:00
A 2D Spectroscopy view of NGC 588
Most of today's stars were formed in high intensity episodes about 7-10 Gyr ago. However, at these redshifts both resolution and dimming effects make it difficult to study in detail the interaction of the gas, dust and newly formed stars. Giant H II regions in very nearby galaxies constitute their best local counterpart to address such a study. Here, I present an analysis of NGC 588, a GHIIR in M33, based on optical Integral Field Spectroscopy...
Ana Monreal Ibero
24/02/2011 - 13:00
Gravitational Wave Astronomy in the 21st Century
The discovery of the binary pulsar PSR B1913+16 by Hulse and Taylor provided definite evidence of the existence of gravitational waves as predicted by Einstein's General Theory of Relativity. It also contributed to encourage the development of different gravitational wave detectors that was pioneered in the 60s by Joseph Weber. Presently, we have a world-wide network of ground detectors that is expected to achieve the first detections during the...
Carlos F. Sopuerta
17/02/2011 - 13:00
The Physics and Philosophy behind Cosmic Time
How far back in time can we have knowledge of the universe? Most cosmologists would agree that the physics describing the ‘material content’ of the universe becomes increasingly speculative the further we go back in time. By contrast, it is widely assumed that the concept of time itself – by virtue of the cosmological standard model – can be safely extrapolated sixty orders of magnitude back from the present to the Planck...
Henrik Zinkernagel
10/02/2011 - 13:00
A Magnetized Jet from a Massive Protostar
Supersonic jets are observed to emerge from a wide variety of astrophysical systems, from young stellar objects (YSOs) to AGNs. Despite their different physical scales (from hundreds to billions of astronomical units), they have strong morphological similarities. However, it is yet unclear whether there is a universal mechanism that can explain the origin of all these jets. Theoretical models suggest that the magnetic field is a fundamental...
Carlos Carrasco González
03/02/2011 - 13:00
The Transneptunian Region and Clues about Planet Formation
The Transneptunian belt is a reservoir of icy bodies in the outer reaches of our solar system. This region is believed to be the source of the Jupiter-Family Comets and is also thought to contain very pristine material, the leftovers of planet formation beyond the ice line. Therefore, the TransNeptunian Objects (TNOs) carry important information on how the solar system was formed, and can give plenty of details on the processes that were...
José Luis Ortíz
01/02/2011 - 13:00
The ESO VLT instrumentation: Technical overview
The present talk emphasizes the most relevant challenges which have been overcome from engineering point of view in order to build the first generation of VLT instruments. Indeed, VLT instrumentation has meant an enormous leap into technical complexity with respect to existing instrumentation for 4m-class telescopes. How ESO has managed the design, procurement and installation of the VLT instrument suite is here presented, as well as the special...
Jean-Louis Lizon
27/01/2011 - 13:00
Substellar Objects in Nearby Young Clusters (SONYC): Towards an Unbiased Census
SONYC, "Substellar Objects in Nearby Young Clusters", is an ongoing project to provide a complete census of the brown dwarf and planemo (free-floating objects with masses comparable to those of massive planets)population in nearby young clusters. The SONYC survey relies on extremely deep wide-field optical and near-infrared imaging and follow-up spectroscopy. We make use of Subaru, VLT, Gemini, CTIO, NTT, and Spitzer to probe the...
Koraljka Muzic
20/01/2011 - 13:00
Star formation at small galactic scales
We present a study of the distribution of star, gas, and dust components in star-forming regions in nearby galaxies. The targets sample a wide range of luminosities and morphologies in order to study how the violent star formation influences the dust and gas distribution inside the star-forming regions. The analysis is based on the comparison of multi-wavelength data from theFar-Ultraviolet (GALEX) to the Infrared (SPITZER and HERSCHEL).  
Mónica Relaño
13/01/2011 - 13:00
Observaciones de la atmósfera de Marte desde la Tierra
Hoy día hay un renovado interés en realizar observaciones de Marte con instrumentación en Tierra de un modo sistemático. Y hacerlo, ademas, en el infrarrojo. La tarea no está exenta de dificultades, incluyendo la contaminación telúrica y el pequeño tamaño del planeta rojo. En este seminario resumiré algunas de las investigaciones que se llevan a cabo, en las que participamos, y que están encaminadas a explotar una de las ventanas infrarrojas...
Miguel Ángel López Valverde
16/12/2010 - 13:00
El campo magnético en galaxias
El campo magnético de una galaxia no es solamente importante porque nos proporciona un método de observación, sino también por sus efectos dinámicos. En el pasado se estudió el proceso v -> B pero cada vez se reconoce más el proceso B -> v , es decir el campo magnético ha dejado de ser una magnitud pasiva para influir activamente en el movimiento. La importancia del magnetismo galáctico afecta a determinadas estructuras y también...
Eduardo Battaner
09/12/2010 - 13:00
Galactic surveys of Planetary nebulae and their astrophysics: past present and future
I will briefly review the PN phenomena and describe the power of these objects as probes of stellar evolution and Galactic evolution. I will address their use as potent kinematic tracers and their value as cosmological distance indicators. Finally I will review the recent major progress in discovery, distance determinations and elimination of mimics before touching on the future potential using multi-wavelength optical-MIR-radio data.  
Quentin Parker
02/12/2010 - 13:00
Stellar Population Synthesis at the End of 2010
Recent developments in stellar evolution theory describing critical phases of this process (e.g. TP-AGB), and the availability of new libraries of theoretical and empirical stellar spectra allow us to build more complete and realistic population synthesis models than those in common use. I will discuss the application of these models to various problems of interest and will review those aspects that still require some amount of theoretical and...
Gustavo Bruzual
23/11/2010 - 13:00
Dark matter on department scale
The direct detection of dark matter on Earth depends on its density and its velocity in the Solar neighbourhood. Unforunately, it is uncertain whether the dark matter distribution on the relevant physical scales (milliparsec) is homogeneous or not. Traditional N-body simulations cannot achieve the required resolution, so we have developed an ingenious method, able to achieve virtually any arbitrary resolution at almost no computational cost....
Daniele Fantin
18/11/2010 - 13:00
Photometric Redshifts and Cosmology: ALHAMBRA, CLASH and the J-PAS Survey
I start with a brief overview of photometric redshifts. I describe the new version of the Bayesian Photometric Redshift software, BPZ, and compare its performance with other public photo-z codes as EAZY or LePhare on datasets like COSMOS or ALHAMBRA. I also introduce two large cosmological projects which heavily rely on photometric redshifts: the MultiCycle Treasury "Clusters and Supernova with Hubble" project, and the Javalambre-PAU...
Narciso Benítez
11/11/2010 - 13:00
A new sample of faint blazars
The available blazar samples were selected at relatively high limiting flux densities in the radio and X-ray band. Those samples have small sizes (30-50 objects) making it difficult to statistically derive parameters related to beaming effects. Moreover, the estimate of those parameters is based on bright and intrinsically luminous sources. A deeper, larger sample of blazars has been constructed by Perlman et al. (1998) and by Landt et al. (2001...
Franco Mantovani
04/11/2010 - 13:00
Mesospheric CO2 clouds on Mars: observations and study with a General Circulation Model
Mesospheric CO2 clouds have been recently observed on Mars, providing important information about the temperatures and winds at the mesosphere, an atmospheric region characterized by the scarcity of observational records. These clouds only appear at particular geographical locations, altitudes above the surface, and times of the year, posing interesting questions about the processes that are at the origin of these clouds. We use a computational...
Francisco González Galindo
28/10/2010 - 14:00
On the discovery of the Zeeman effect on the Sun and in the laboratory
The origin of the discoveries, both on the Sun and in the laboratory, of the action of a magnetic field on spectral lines, the so-called Zeeman effect, is discussed. The talk embraces the period from 1866, the first date of which the speaker is aware of observed evidences about the widening of spectral lines in sunspots (as compared to those formed in the photosphere), until 1908, the year in which the magnetic field in sunspots is definitely...
José Carlos del Toro Iniesta
21/10/2010 - 14:00
Umbral dots: clues to the internal structure of sunspots
Sunspots have been studied since the time of Galileo, but they still remain one of the most active research fields in solar physics. Especially, research on the fine structure of sunspots made great progress with the advent of the Hinode satellite and CRISP spectropolarimetry at the Swedish Solar Telescope on La Palma. Umbral dots (UDs) are tiny bright points observed in the umbra of sunspots. They are scientifically interesting because they...
Hiroko Watanabe
15/10/2010 - 14:00
The Euler Characteristic as a Measure of the Topology of Cosmic Reionization
After giving basic information about what and how we know about the epoch of reionization, I will very briefly introduce the cosmic reionization simulations which I am analyzing. Next, the concepts of topology and, in more detail, the Euler Characteristic are introduced. Only after providing the audience with this necessary background, I will present some results from the analysis of our cosmic reionization simulations.  
Martina M. Friedrich
08/10/2010 - 12:30
El Centro Astronómico Hispano-Alemán: futura instrumentación y operaciones
El Observatorio de Calar Alto cuenta en estos momentos con tres telescopios ópticos-infrarrojos y un conjunto de 11 instrumentos que cubren un gran rango de necesidades en distintos campos científicos, con una demanda desigual por parte de la comunidad astronómica. A partir del segundo semestre del 2010 se procederá a la apertura del archivo público del observatorio, optimizando la producción científica. Además, se están desarrollando dos...
David Barrado
30/09/2010 - 14:00
The Pipe Nebula: Primordial conditions of a quiescent molecular cloud
We present the results of a new deep, near-infrared survey of the essentially starless Pipe Nebula, combining data from ESO, Calar Alto, and SPITZER telescopes, and the 2MASS survey. We use this new high sensitivity data set to construct dust extinction maps with spatial resolutions one order of magnitude smaller that the local Jeans Length. Our maps allowed us to determine the structure of the cloud down to and below the scale of dense pre-...
Carlos Román Zúñiga
16/09/2010 - 14:00
Active Galactic Nuclei at parsec scales
We present a representative SED for low-luminosity AGNs, built from high-spatial resolution data for the LINERs and faint Seyferts in the sample. This distribution differs from those of bright Seyferts and Quasars, suggesting that the internal structure of AGNs appears to be largely determined by the amount of energy released by the central engine. On the other hand, we present a multiwavelength study of the nuclear star-formation (~2.5kpc x 2....
Juan Antonio Fernández Ontiveros
09/09/2010 - 14:00
GO-IRS: a new multi-object spectrograph for the GTC
GO-IRS stands for "GTC Optical Intermediate Resolution Spectrograph". It is the answer of a big team of over 100 experienced researchers and engineers from the University of Florida, China and Spain to the recent call for new instrumentation for the 10.4 m Gran Telescopio Canarias (GTC). The GO-IRS main facts are: 1000 MOS fibres in a 15 arcmin circular field of view; 4x400 IFU fibres in the central 2 arcmin; resolution powers of R=20k...
José Antonio Caballero
06/09/2010 - 14:00
Fundamental Constants in Time and Space
According to the standard model of particle physics, fundamental constants, at least their low-energy limits, should be independent of time and location. Many fundamental constants of physics and astronomy are well defined locally. However, this "constancy of constants'' may not necessarily hold over the largest spatial and temporal scales, which are inaccessible by geological or astronomical studies of nearby targets. Now, advances in...
Christian Henkel
15/07/2010 - 14:00
The Square Kilometer Array. Should we all wait until 2022?
The SKA, composed of several hundreds of 3 different types of antennas with separations up to 3000 km, and up to 200 square degrees FOV, can be considered as the largest, most sensitive, and most difficult radio telescope ever to be built. Some of the research areas where it will be able to provide fundamental answers include the dark era, when gas in galaxies was first turned in stars and the first black holes formed, star formation in nearby...
Lourdes Verdes-Montenegro
08/07/2010 - 14:00
Escalado de la variabilidad y la luminosidad en rayos X en fuentes ULXs
Las fuentes Ultra-luminosas en rayos X (ULXs, del inglés Ultra-luminous X-ray sources) pueden ser la población que conecta los agujeros negros de nuestra Galaxia (<1000 MSol) y los objetos supermasivos en el centro de las galaxias (1E+05-1E+08 MSol). Éstos son los denominados agujeros negros de masas intermedias (1000-100000 MSol). Sin embargo su naturaleza aún no está clara. Recientemente hemos investigado la relación entre la amplitud de la...
Omaira González Martín
02/07/2010 - 14:00
An Initial Mass Function for Individual Stars in Galactic Disks
The Initial Mass Function (IMF) has been derived by a variety of methods. Here we propose an IMF form (a Smoothed Two-Power Law psi_STPL) that approaches a power law at both low stellar masses (psi_STPL ~ m^(gamma)) and at high stellar masses (psi_STPL ~ m^(-Gamma)) with a turnover near the characteristic mass m_ch. The values of gamma and m_ch are derived from two integral constraints: i) the ratio of the number density of stars in the range m=...
Antonio Parravano
01/07/2010 - 14:00
Magnetic field configuration at the central region of our Galaxy
It has been long debated whether the magnetic field configuration at the central region of our Galaxy is toroidal or poloidal. Previous works that have addressed this question were mainly based on radio observations of non-thermal radio filaments, and sub-mm polarimetric observations of dense molecular clouds. I will present a result of a wide-field near-infrared polarimetric survey of the central 2 deg by 2deg region; these wavelengths trace...
Shogo Nishiyama
17/06/2010 - 14:00
Gamma Rays from the Relativistic Plasma Jets of Blazars
X-ray and gamma-ray flares are a common occurrence in blazars, active galactic nuclei with relativistic plasma jets that are pointing almost directly at us. This talk will present the results of a comprehensive multi-waveband monitoring program of blazars with gamma-ray flares observed by the Fermi Gamma-ray Space Telescope. The relative timing of the flares at different wavebands and the emergence of bright radio knots moving down the jet at...
Alan P. Marscher
27/05/2010 - 14:00
An overview of regional atmospheric phenomena on Mars
Aymeric Spiga
20/05/2010 - 14:00
2009 Año Internacional de la Astronomía: un año para recordar
Hemos dicho adiós al Año Internacional de la Astronomía (AIA-IYA2009). En España nos propusimos organizar un Año de la Astronomía con un nivel de excelencia acorde con la magnífica evolución que esta rama de la ciencia ha tenido en nuestro país en las últimas décadas y lo hemos conseguido. Las cifras hablan por sí solas: más de 3100 actividades organizadas por al menos 1300 entidades con la participación de miles de personas que han convertido...
Montserrat Villar Martín
13/05/2010 - 14:00
PLATO: The exoplanetary system explorer
I present a general overview of the PLAnetary Transits and Oscillations of stars (PLATO) space mission. PLATO was recently approved by ESA’s Science Programme Committee, together with Euclid and Solar Orbiter missions, to enter the so-called definition phase, i.e. the step required before the final decision is taken (only two missions will be implemented). To be launched in 2018, PLATO is a third generation mission, which will take...
Juan Carlos Suárez
06/05/2010 - 14:00
The IAA cosmic dust laboratory
Dust particles exist in a wide variety of scenarios ranging from the Earth's atmosphere to other planetary and cometary atmospheres in the Solar System, interplanetary medium, reflection nebulae, circumstellar disks, etc. Those dust particles play an important role in the radiative balance of the body under study. Light scattering properties of spherical particles can be easily computed from Lorenz-Mie theory. However, in the majority of the...
Olga Muñoz Gómez
29/04/2010 - 14:00
Molecular Gas and Star Formation in Local Early-Type Galaxies
The molecular gas content of local early-type galaxies is constrained and discussed in relation to their evolution. First, as part of the Atlas3D survey, we present the first complete, large (>250 objects), volume-limited survey of molecular gas in normal local early-type galaxies, obtained with the IRAM 30m telescope. In particular, we find a surprisingly high detection rate of 23%, independent of mass and environment, but dependent on the...
Martin Bureau
22/04/2010 - 14:00
Supermassive Black Holes
Dr. Elena dalla Bontá
15/04/2010 - 14:00
ALMA/CASA: You better get ready for them!
ALMA is going to start its Early Science Observations during 2011 and a Call for Early Science with its compact array will be issued at the end of this year. At the same time, CASA, the software that ALMA users will have at their disposal, is being continuously developed. I will present an overview of a couple of workshops I attended in Manchester related to ALMA and CASA, which hopefully will encourage you to think for proposals with ALMA and...
Miguel Ángel Pérez Torres
18/03/2010 - 13:00
Unfolding Properties of Mass Loss at the Tip of the Asymptotic Giant Branch
In the final stages of stellar evolution low- to intermediate-mass stars lose their envelope in increasingly massive stellar winds. Matter, which has been processed inside these stars, is thereby returned to the interstellar medium, and mass loss also determines properties of subsequent planetary nebulae. In order to obtain properties of winds at the tip of the asymptotic giant branch we observed weak halos of a set of planetary nebulae in the...
Christer Sandin
16/03/2010 - 13:00
OCTOCAM: A fast multichannel camera and spectrograph for the 10.4m GTC
OCTOCAM is a high time-resolution multi-channel instrument that is being proposed for the 10.4m GTC telescope. It will perform simultaneous observations in 8 bands, covering the complete spectrum from the ultraviolet (u-band) to the near infrared (K-band) in a single exposure. An imaging mode will allow to observe a field of 2'x2' in all ugrizJHK bands, with the possibility to observe at time resolutions of up to 10 ms, while the spectroscopic...
Antonio de Ugarte Postigo
11/03/2010 - 13:00
Size matters
This is a talk I gave last October in Freiburg as the opening key-note lecture of the "1st EAST-ATST Workshop". The American ATST (Advanced Technology Solar Telescope) and the European EST (European Solar Telescope) are projects for designing and building the new generation of large-aperture, solar telescopes. Both of the 4-m class constitute a technological breakthrough and promise a significant step forward in our understanding of...
José Carlos del Toro Iniesta
04/03/2010 - 13:00
Structure and kinematics of the Milky Way's nuclear star cluster
The Galactic center is a unique target for studying the properties of the nuclei of galaxies in general. The supermassive black hole, Sagittarius A*, that is located at the dynamical center of the Milky Way is surrounded by the densest and most massive star cluster of our Galaxy. In this talk I will focus on the most recent results of research on the structure and kinematics of the Milky Way's nuclear star cluster. Adaptive optics imaging is a...
Rainer Schoedel
25/02/2010 - 13:00
Testing spectral models for Stellar Populations
High spectral resolution evolutionary synthesis models have become a routinely used ingredient in extragalactic work, and as such deserve thorough testing. Star clusters are ideal laboratories for such tests. In this talk I apply the spectral fitting methodology to a sample of clusters, mainly from the Magellanic Clouds and spanning a wide range in age and metallicity, fitting their integrated light spectra with a suite of modern evolutionary...
Rosa González Delgado
19/02/2010 - 18:00
Pulsating stars harbouring planets
In this talk, I present a review of the current status of the very recent line of research linking stellar seismology and exoplanet search. I give a summary of the main exoplanet searching techniques and a general overview of stellar seismology. Some examples of the synergies between these two lines will also be given. If a star harbouring planets is found to be pulsating, our knowledge of the physical characteristics of these planets is...
Andrés Moya Bedón
16/02/2010 - 12:00
Extragalactic research with the Virtual Observatory
Nowadays, following years of technological development, Virtual Observatory standards, resources, and services became powerful enough to help astronomers making real science on everyday basis. An astronomer is able to combine ``online'' VO-enabled parts with ``offline'' research stages including dedicated data processing and analysis, observations, numerical simulations. I will present three VO-science projects combining VO and non-VO blocks,...
Igor Chilingarian
11/02/2010 - 13:00
Observational constrains to galaxy evolution from the distribution of integrated stellar ages and metallicities in spiral galaxies
I will present new results on the integrated stellar populations of bulges, bars and disks of spiral galaxies from long-slit spectroscopic observations. We have derived the ages and metallicities using both the whole spectra and stellar line-strength indices along the bar and bulges for a sample of 20 disk galaxies and derived the populations in the disks of four galaxies using GEMINI spectroscopic data. We find, in the distribution of stellar...
Isabel Pérez Martín
04/02/2010 - 13:00
First results of the Fermi Large Area Telescope
The Fermi Large Area Telescope (Fermi LAT) is a pair conversion telescope sensitive to photons in the energy range 30 MeV to >300 GeV. It was launched on June 11th 2008 and has now been successfully operating for over a year and made breakthrough discoveries in high energy astrophysics. In this seminar I will give an overview of the results from Fermi LAT and the implication it has had in astrophysics and astro-particle physics.  
Gudlaugur Johannesson
28/01/2010 - 13:00
The Galactic O-Star Spectral Survey (GOSSS)
I present a large-scale spectral survey that is currently obtaining spectra of all known Galactic O stars down to B=13 with R=3000. The project includes additional observations of subsamples with [a] multi-epoch spectroscopy with R=40000, [b] flux-calibrated optical spectroscopy, and [c] high-spatial-resolution imaging. The main part of GOSSS is based on data from OSN, CAHA, and LCO. I will describe the current status of the survey and present...
Jesús Maíz Apellániz