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26/04/2018 - 12:30
Lightning – from Its Base to Space
Lightning has been studied for centuries with surprisingly meager progress since the early breakthroughs of Franklin. There are numerous reasons for this lack of progress: lightning is complex, it is very energetic with large peak power - hard for in-situ probes to survive, it is spatially and temporally sparse – hard to place a sensor in an optimal location. However, modern technological advances and innovations have led to new remote...
Prof. Hugh Christian
Earth System Science Center,University of Alabama in Huntsville, USA
18/04/2018 - 12:30
Recreating the Early Mass-Loss Histories of pre Planetary Nebulae
Hubble images of the amazing symmetries of young planetary nebulae have captured the imagination of the public. Scientifically, unravelling the physics of their ejection histories is the ultimate goal. I will present detailed surprisingly simple hydro outflow models that capture both the present shapes and the flow kinematics of several and very disparate nebulae.
Prof. Bruce Balick
Univ. Washington, Seattle, USA
13/04/2018 - 12:30
Observatorio Astrofísico de Javalambre: a dedicated facility for large sky surveys
The Observatorio Astrofísico de Javalambre (OAJ) is an astronomical infrastructure conceived to carry out large sky, multi-filter astronomical surveys from the Northern hemisphere. It is fundamentally structured around two large field-of-view (FoV) telescopes and their corresponding panoramic instrumentation for direct imaging. OAJ main telescopes are the Javalambre Survey Telescope (JST/T250), a 2.55m telescope with a FoV of 3 deg diameter, and...
Dr. Antonio Marín-Franch
CEFCA,Spain
12/04/2018 - 12:30
The J-PAS and J-PLUS large sky surveys: an unprecedented view of the Universe in multi-colors
The Observatorio Astrofísico de Javalambre (OAJ), managed and operated by the Centro de Estudios de Física del Cosmos de Aragón (CEFCA), is mostly devoted to conduct large sky multi-filter surveys with two large field of view telescopes of 2.5m and 80cm and their respective panoramic instrumentation. The main survey to be carried out in the next years is J-PAS (Javalambre Physics of the Accelerating Universe Astrophysical Survey). Conceived as a...
Dr. Javier Cenarro
CEFCA,Spain
05/04/2018 - 12:30
ESERO Spain, del espacio al aula
Un proyecto de la ESA acogido en el Parque de las Ciencias para fomentar las vocaciones científico-tecnológicas en las primeras etapas educativas, haciendo uso del contexto del espacio.
Manuel Roca & Domingo Escutia
Parque de las Ciencias, Spain
22/03/2018 - 12:30
Carbon Chemistry in Carbon-rich AGB stars
The chemistry of carbon in evolved stars will be discussed from the observational and chemical modelling point of view. From the photosphere of the central star to the external layers of the circumstellar envelope different chemical processes allow the formation of different carbon molecules, among them carbon clusters and carbon chain radicals. The chemistry if not completely understood as many reactions are involved in the formation of...
Prof. José Cernicharo
IFF-CSIC, Spain
21/03/2018 - 10:00
MEGARA @ GTC: performance review and commissioning results
MEGARA, the optical multi-object spectrograph (MOS) for the GTC 10m telescope, has been developed by a Consortium whose partners are UCM, INAOE, IAA-CSIC and UPM. MEGARA has 2 observing modes on sky: (a) a central IFU 12.5” x 11.3” of 567 fibers, complemented with 8 x 7-fiber bundles for sky subtraction, and (b) a MOS mode with 92 robotic positioners, covering a total FoV of 3.5' x 3.5'. MEGARA provides intermediate-to-high spectral resolution (...
Dr. Jorge Iglesia
IAA-CSIC
15/03/2018 - 12:30
Navigating the Universe : « Cosmic Flows » program
I will present the evolution of the “Cosmic Flows” program spanning ten years of research since its inception in 2006. From CF1 to the latest CF3 data-set, an order of magnitude in the number of observational galaxy distances is gained, meanwhile the cosmographied volume is multiplied by 150. A theoretical framework has been developed so as to accommodate and analyze the data. This includes the Bayesian reconstruction tools of the Wiener filter...
Professor Hélène Courtois 
University of Lyon 1, France
07/03/2018 - 12:30
Mesa redonda: "Luces y sombras en la carrera científica de las mujeres. Hacia una igualdad efectiva entre hombres y mujeres."
Componentes de la mesa: Laly Gallego, contratada predoctoral Marta González, contratada postdoctoral Rosa González, primera profesora de investigación del IAA Rosa de Castro, gestora de proyectos europeos Nuria Rico, profesora de la ETS de Ingenierías Informática y de Telecomunicaciones de la UGR. Lucia Estevan, contratada FPU de la UGR y activista de la plataforma @huelga8mgranada Coordina: Isabel Márquez, vicedirectora del IAA
Mesa redonda
IAA-CSIC, Spain
22/02/2018 - 12:30
LIGHT AND SHADOW IN THE GALACTIC CENTER
The luminous S-star cluster in the Galactic center allows us to study the physics close to a super-massive black hole including distinctive dynamical tests of general relativity. Our best estimates for the mass of and the distance to Sgr A* is currently obtained using the three shortest period stars. Additionally, we aimed at a new and practical method to investigate the relativistic orbits of stars in the gravitational field near Sgr A...
Prof. Andreas Eckart
I. Physikalisches Institut, Universitaet zu Koeln, Germany
15/02/2018 - 12:30
Can CALIFA tell us something about the cosmic evolution of the star formation rate and stellar mass of the Universe?
We investigate the cosmic evolution of the absolute and specific star formation rate (SFR, sSFR) of galaxies as derived from a spatially-resolved study of the stellar populations in a set of nearby galaxies from the CALIFA survey. The results show again the uniqueness of the CALIFA survey to characterize the cosmic evolution of the spatially- resolved SFR and stellar mass of galaxies. Also the success of the fossil record of the stellar...
Prof. Rosa González
IAA-CSIC, Spain
25/01/2018 - 12:30
Diffuse Ionized Gas in CALIFA (and MaNGA) galaxies
We use spatially resolved spectroscopy from the CALIFA survey to study the nature of the line emitting gas in galaxies of different Hubble types, focusing on the separation of star-forming (SF) regions from those better characterized as diffuse ionized gas (DIG). The diagnosis is carried out in terms of the equivalent width of Ha (W_Ha). Three nebular regimes are identified: (1) Regions where W_Ha...
Dr. Roberto Cid Fernandes
Universidade Federal de Santa Catarina, Brazil
18/01/2018 - 12:30
Dust belts around Proxima Centauri. First results from a multi-department project at the IAA
In this talk I will present the results of an exploratory program we carried out at the ALMA Observatory soon after the discovery of a terrestrial planet candidate in a temperate orbit around Proxima Centauri, the star closest to our Sun. Our ALMA observations reveal the presence of a belt of dust orbiting the star at distances ranging between 1 and 4 au, approximately. This dust might trace a small-scale analog to our solar system's Kuiper Belt...
Dr. Guillem Anglada
IAA-CSIC, Spain
11/01/2018 - 12:30
Dynamics and properties of gas at the Center of the Galaxy
In the central parsec of the Milky Way Galaxy the environment of the super-massive black hole (SMBH) presents a complicated composition that includes a very young star cluster mixed with qby tidally stretched clouds of ionized gas (the Minispiral). The Galactic Center's inner few tens of arcseconds have been observed at high resolution with Keck for 20 years, with the primary goal of monitoring stars orbiting the SMBH. This unique baseline of...
Dr. Anna Ciurlo
UCLA, USA
30/11/2017 - 12:30
GRB 170817A: a peculiar low-luminosity short gamma-ray burst associated with a NS-NS merger gravitational wave signal
Short-duration gamma-ray bursts (sGRBs) have long been proposed to be produced in systems involving the coalescence of double neutron stars (NS-NS), and the observations of sGRB afterglows and host galaxies are consistent with such a conjecture. Based on the estimated event rate density derived from previously observed sGRBs at cosmological distances, the chance of detecting a sGRB within a small volume for detectable NS-NS mergers by advanced...
Dr. Binbin Zhang
IAA-CSIC, Spain
23/11/2017 - 12:30
Fighting in Maya ruins: Data Engineering, Data Science, computation clusters and the trans-neptunian search tool
IAA is sitting under a gold mine of data, achieved in past observing campaigns, that will be increased with the data coming from next instrumentation. A tool that can exploit the wealth beneath our feet is the Engineering and Data Science (EDS). This lecture will introduces the EDS and its application on preliminary analysis on a concrete astronomical problem: the search of trans-neptunian objects. Two of the tools used in this analysis will...
Dr. Rafael Morales
IAA-CSIC, Spain
16/11/2017 - 12:30
Surprising characteristics of the dwarf planet Haumea revealed by a stellar occultation
The solar system currently contains 8 planets and 5 dwarf planets. Among the 5 dwarf planets, 4 of them dwell in the transneptunian region, and among the transneptunian dwarf planets, the only one that remained poorly characterized was Haumea. This was because all other dwarf planets had been visited by spacecraft or had produced stellar occultations which allowed us to determine some of their basic physical properties with accuracy. The only...
Dr. Jose Luis Ortíz
IAA-CSIC, Spain
09/11/2017 - 12:30
Conclusions after the first work of Master's degree in Data Science at the IAA
Advanced algorithms of automatic learning and/or massive data processing, applied to astronomical data, promise to provide very pleasant surprises. Both types of algorithms are part of the field of Data Science research. Taking advantage of the fact that Granada has a worldwide reference group in Data Science (Soft Computing and Intelligent Information Systems http://sci2s.ugr.es/, directed by Francisco Herrera), a collaboration with the IAA...
Dr. Rafael Morales
IAA-CSIC, Spain
02/11/2017 - 12:30
W170817/GRB 170817A/AT2017gfo: A Tryptich of Rosetta Stones for Compact Object Astrophysics
On the 17th of August 2017, an astronomical event occurred which represents a watershed in our understanding of neutron stars. The LIGO and Virgo gravitational-wave observatories detected the first compact binary inspiral produced by two neutron stars, which was followed about two seconds later by a short GRB, labelled GRB 170817A, detected by the GBM instrument on Fermi. The detection by all three GW observatories allowed the error region to be...
Dr. David Alexander Kann
IAA-CSIC, Spain
26/10/2017 - 12:30
The Supernovae that Accompany Gamma-ray bursts
Energetic supernovae have been seen to occur at the same spatial locations as long-duration gamma-ray bursts (GRBs). These so-called gamma-ray burst supernovae (GRB-SNe) are bright and energetic, and their spectra indicate that material within in the supernova outflow moves at tens of thousands of kilometres per second. The first GRB-SN was observed in 1998, with only 50 in the intervening years. Over the past two decades, the physical...
Dr. Zach Cano
IAA-CSIC, Spain
19/10/2017 - 12:30
Bringing science to kids and general public at the Observatoire de la Côte d'Azur
It is important to transmit the science developed in a research institution to the public. This transmission helps to increase the scientific culture of the general public, and also can help to awake scientific vocations in the kids. During this talk I will present several actions carried out at the Observatoire de la Côte d'Azur (Nice, France), to bring astronomy to the school children and also to the general public. I will talk about the...
Dr. Olga Suarez
Observatoire de la Côte d'Azur , France
16/10/2017 - 12:00
SKA Science Data Centres: A Platform for Global Astronomy
M. Wise: The SKA is an ambitious project to construct one the world’s more powerful radio telescopes and enable transformational science across a wide range of research areas. Based on current projections, the SKA Observatory, once operational, is expected to produce an archive of standard data products with a growth rate on the order of 300 petabytes per year. Although the challenges associated with populating and maintaining the SKA science...
Prof. Michael Wise & Prof. Ian Wird
Astronomy Group at ASTRON, Netherland & LHC Computer Grid (CERN), Switzerland
05/10/2017 - 12:30
Dust evolution in the interstellar medium
Dust grains play a crucial role in many physical and chemical processes in the interstellar medium (ISM) and in protoplanetary disks (PPDs). In the ISM, dust properties influence, for example, the formation and temperature of the major molecules in molecular clouds. It is therefore important to characterise the grain size, structure, shape and material composition in all phases of the ISM. Observations of the dust SED and extinction give...
Dr. Melanie Köehler
Queen Mary University of London ,UK
27/09/2017 - 12:30
High-z proto-clusters with the GTC
The study of high-z proto-clusters are important for constraining several cosmological parameters. These clusters are hard to find as they do no yet emit the strong X-ray emission typical of the local clusters. These proto-clusters are however found either around strong QSO’s or more often around strong star-forming galaxies. Incidentally, they are also found around strong sub-millimetre galaxies. We have undertaken a search for Lyα sources...
Prof. Jose Miguel Rodríguez-Espinosa
IAC, Spain
21/09/2017 - 12:30
Analogue spacetimes
Analogue spacetimes, (as opposed to general relativity spacetimes), arise when applying the mathematics of differential geometry to generic physical systems. As long as the perturbations have finite propagation speed, then the causal structure can be summarized by propagation cones, similar to the light cones of general relativity; thereby defining a conformal structure. Often one can go further and define an analogue Lorentzian metric....
Prof. Matt Visser
Victoria University, Wellington, Nueva Zelanda
14/09/2017 - 12:30
Hydrodynamical models of planetary nebulae with [WC] central stars
High-resolution, long-slit spectroscopic observations of two planetary nebulae, M1-32 and M3-15 are presented. The observations were obtained with the 2.1-m telescope at the OAN- SPM, and MES spectrograph. M1-32 shows wide wings on the base of its emission lines, M3-15 has two very faint high-velocity knots. To model M1-32 and M3-15 we built a 3D model consisting in a jet interacting with an equatorially concentrated slow wind, emulating the...
Jackeline Rechy Garcia
Instituto de Astronomía, UNAM
07/09/2017 - 12:30
High resolution radio imaging of nearby star-forming galaxies: on the way to SKA
The Square Kilometer Array (SKA) will be a key instrument in the study of our local Universe. In particular, by virtue of its high sensitivity (both to point sources and diffuse low surface brightness emission), angular resolution and the frequency ranges covered, the SKA will undertake a very wide range of astrophysical research in the field of nearby galaxies. By surveying nearby galaxies of all types with microJy sensitivity and sub-arcsecond...
Prof. Antxon Alberdi
IAA-CSIC
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
IAA-CSIC
08/06/2017 - 12:30
The Dynamic Universe: Adventures in Time Series Analysis
Modern astrophysics has revealed a Universe alive with explosions great and small. It is an astonishingly active place, far different from the serene “clockwork Universe” previously envisioned. Our tour of this dynamic Universe includes the active Sun, extrasolar planets and the search for intelligent life on them, the highly active relativistic plasma that is the residue of a stellar explosion in the year 1054 AD, dramatic x-ray...
Dr. Jeff Scargle
Space Science Division, NASA Ames Research Center, USA
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
IAA-CSIC
25/05/2017 - 12:30
The Faint End of the HI Mass Function
Low-mass galaxies are the most numerous type of extragalactic system at all epochs of the universe. The population of low-mass galaxies in the local volume allows unique astrophysical and cosmological perspectives that are unavailable in more distant or more massive systems. The ALFALFA blind extragalactic HI survey has cataloged tens of thousands of gas-rich galaxies in the local universe and has populated the faint end of the HI mass...
John Cannon
Macalester College, MN, USA
18/05/2017 - 12:30
Bombs and flares at the Surface and Lower Atmosphere of the Sun
A spectacular manifestation of solar activity, is the appearance of transient brightenings in the far wings of the H(alpha) line, originally known as "Hydrogen bombs” but now as "Ellerman bombs" (EBs) after their discoverer. Recent observations obtained by the Interface Region Imaging Spectrograph (IRIS) have revealed another type of plasma ``bombs'' (UV bursts) with high temperatures of perhaps up to 80 000 K within the cooler lower solar...
Prof. Viggo Hansteen
Institute for Theoretical Astrophysics, University of Oslo & IAA-CSIC
11/05/2017 - 12:30
The Early History of Gamma-ray Bursts
The discovery of Gamma-Ray Bursts (GRBs), and the subsequent realization that they are the result of the largest and most distant explosions in the Universe, represents one of the most surprising and fundamental discoveries in astronomy in the past century. Several space-borne and ground-based breakthrough observations in GRBs that led to this realization occurred during the 1990’s. This discovery resulted in the award of the 2011 Shaw Prize...
Prof. Gerald J. Fishman
NASA – Marshall Space Flight Center (Ret.) Huntsville AL, USA
09/05/2017 - 12:30
Blender 3D, el programa 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
Departamento de Electrónica y Tecnología de los Computadores, UGR
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
Institut de Mathématiques de Bourgogne (IMB) Université de Bourgogne
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
IAC
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
IAA-CSIC
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
IAA-CSIC
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
Universidad de Nanjing, China
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
European Space Agency
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
European Space Agency
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
Sussex University (UK)
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
Kavli Institute for Astronomy and Astrophysics, Peking University
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
IAA-CSIC
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
European Space Agency (ESAC), Madrid, Spain
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
INAF-Osservatorio Astrofisico di Arcetri, Florencia
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
IAC,Spain
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
Institut d'Astrophysique Spatiale, CNRS/Université Paris Sud, Orsay, France
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
IAA - CSIC
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
IAA - CSIC

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