Seminars
Displaying 251 - 300 of 1222
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10/10/2019 - 12:30
THE INNER DEBRIS OF SN1987A: MOLECULAR AND DUST EMISSION The supernova SN1987A in the Large Magellanic Cloud, together with new instrumentation like ALMA, offers an unprecedented opportunity to tackle fundamental issues of supernova explosions. Large masses of molecules and dust have been formed in its inner debris over the last 25 years. Recently developed tomographic techniques have allowed to obtain 3D-images of its molecular emission. Also, high-resolution images of dust emission have recently... Prof. Jon Marcaide |
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07/10/2019 - 12:30
SO Colloquia: FPGAs in space: current experiences, future challenges and opportunities FPGAs are key components in space equipment due to their versatility and performance to implement digital functions. They are embarked in satellites and used in many applications; such as observing the earth, provide telecommunications and navigation services as well as to contribute to science and explore the wider Universe. The FPGAs face very different conditions in space compared to the terrestrial applications, especially due to the... Merodio Codinachs |
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04/10/2019 - 12:30
Cúmulos Jóvenes: eclosionando, moviéndose, volando En las últimas dos décadas, nuestro conocimiento de los cúmulos estelares jóvenes, ha progresado rápidamente del uso de imágenes estáticas con cada vez mayor calidad, hacia mapas de movimientos en seis dimensiones (posiciones, velocidades), que están cambiando muchas de nuestras ideas de cómo los cúmulos estelares surgen de los complejos de nubes moleculares. Conforme nos movemos de escalas de parsecs a hectoparsecs, ahora vemos a los cúmulos... Dr. Carlos G. Román Zúñiga |
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03/10/2019 - 12:30
Some aspects of high precision machines for astronomical applications Cranfield Precision are not specialists in astronomy but their expertise in designing and building very precise special-purpose machines has contributed to several important astronomical projects. In this talk I will show several machines with astronomical applications and select some features of particular interest for discussion. Richard May-Miller |
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19/09/2019 - 12:30
JPAS: A survey for Galaxy Evolution studies JPAS is a survey of 5000-8000 deg2 of the sky with 56 narrow band filters in the Observatory of Javalabre. This survey is very relevant for Cosmology, Galaxy Evolution and Stellar Physics studies. In January 2020, JPAS with its JPCam will have the first light. However, the project has already taken data of 2 deg2 of the sky in two cosmological fields (AEGIS and JWST-NEP). The 2-4th of December will be the first data release (DR1) during the RIA... Dr. Rosa González Delgado |
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12/09/2019 - 12:30
Detection of Exocomets: The gaseous environment of Main-Sequence Stars Planetesimals and small solid bodies in general are key to understand the chemical and dynamical evolution of planetary systems. Direct detection outside the Solar System is still not feasible. However, indirect evidences of such bodies as dusty debris disks or the presence of large amounts of gas in the close-in surroundings of main-sequence stars have been collected for over 30 years now. Transient events observed as variable non-... Dr. Isabel Rebollido |
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05/09/2019 - 12:30
Broad line AGN in the MaNGA survey This talk presents a way to find Type I Active Galactic Nuclei in the MaNGA survey (Mapping Nerby Galaxies at Apache point observatory). The method is based on flux ratios between spectral regions where a broad line in emission is expected. Likewise, the spectroscopic analysis of 44 galaxies with nuclear activity is shown; as well as the estimation of the mass of supermassive black holes and the effect that the active nucleus has on... Dra. Alenka Negrete |
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09/07/2019 - 12:30
The Orientation of the Collimated Outflows of Planetary Nebula: Independence Day The discovery of collimated outflows in planetary nebulae (PNe) has changed the paradigm of PN formation. They actively participate in the nebular shaping immediately before or while fast stellar winds and D-type ionization fronts shock and swept the nebular envelope. The general properties of collimated outflows of PNe cannot be studied because projection effects do not allow us to determine their space velocities and linear sizes. The large... Jackeline Suzett Rechy Garcia & Martin A. Guerrero |
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27/06/2019 - 12:30
Stellar Tidal Streams in Nearby Galaxies as Dark Matter Probes Mergers and tidal interactions between massive galaxies and their dwarf satellites are a fundamental prediction of the Lambda-Cold Dark Matter cosmology. These events are thought to influence galaxy evolution throughout cosmic history and to provide important observational diagnostics of nonlinear structure formation. Thin stellar streams in the Milky Way and Andromeda galaxies are spectacular evidence for satellite disruption at the... Dr. David Martinez-Delgado |
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25/06/2019 - 12:30
Properties of ionized outflows in MaNGA DR2 galaxies Feedback originated from star formation and AGN activity in galaxies can have a significant impact on their evolution. The action of feedback leads to several processes that might have a significant effect on the surrounding gas, for example by heating the system, halting or enhancing star formation, or enriching the interstellar medium. Constraining the incidence and properties of feedback events such as ionized outflows is therefore crucial to... Bruno Rodríguez Del Pino |
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19/06/2019 - 11:00
SO Colloquia: Searching extended line-emission objects in wide-field surveys: The IPHAS experience One of the problems we are facing in the study of evolved low- and intermediate-mass stars such as Planetary Nebulae (PNe) is the lack of completeness. Most known PNe belong to the bright or intermediate part of the luminosity function, leaving out those at the faint end. Any global chemical, kinematical, and physical analysis of the PN population is therefore biased. In 2003 the INT Photometric Halpha Survey started scanning the... Dra. Laurence Sabin |
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18/06/2019 - 12:30
Oxygen Line Diagnostics in X-ray spectroscopy Line diagnostics is very important to understand the physics of astronomical sources. Taking advantage of oxygen line diagnostics in X-ray spectroscopy, I will show some of our research for both the moderate-resolution the high-resolution X-ray spectra based on the newly updated atomic database (ATOMDB). I will demonstrate its power for SgrA spectrum, HII regions, and some nearby galaxies. In addition, I will introduce related space mission... Dr. Li Ji |
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13/06/2019 - 12:30
SO Colloquium: Back to Orion Orion is the massive star formation region closest to the Sun and in consequence it has been studied in detail. I will present three recent results from the IRyA group on this region. The first one is the ultraprecise determination of the distance to Orion using VLBI observations of stars with non-thermal emission. The second result is a study of the kinematics of the stars with either termal or non-thermal emission. Finally, we will focus on... Dr. Luis F. Rodríguez |
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07/06/2019 - 12:30
The Very Large Array Sky Survey (VLASS) and the next generation Very Large Array (ngVLA) The VLASS is part of a new generation of radio sky surveys. It covers the entire sky above -40 degrees declination. Observations started with the Karl G. Jansky Very Large Array in 2017 and the first epoch covering the entire survey area will be completed by July 2019. This will be followed by two more complete passes with an anticipated completion by 2024. In comparison to previous surveys, the observations are performed at 2-4 GHz and at... Dr. Frank Schinzel |
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04/06/2019 - 12:30
Correlations between the size and the stellar population properties of quiescent galaxies During the last decades, many authors have put large efforts to shed light on the mechanisms responsible of the generalized growth in size of galaxies, as well as to disentangle the main “driver” of their stellar content. In our study, we aim at stating new constraints on the mechanisms that may drive the growth in size of massive galaxies through the study of the stellar population properties of quiescent galaxies within the stellar mass-... Dr. Luis Díaz García. |
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24/05/2019 - 11:30
A prototype SKA Science Regional Centre at the IAA In this seminar we will describe our involvement in the design of the SRCs, how we are preparing for hosting an SRC at the IAA - one of the strategic objectives of the IAA Severo Ochoa programme - as well as potential benefits for the IAA and collaboration opportunities, such as the one already started with the PLATO team. We will conclude by illustrating the challenges associated with following Open Science principles with an example of their... Lourdes Verdes-Montenegro, Susana Sánchez, Michael G. Jones |
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17/05/2019 - 12:30
TIDES, PLANETARY WAVES, AND ATMOSPHERIC COUPLING A growing number of studies report linkages between unrelated stratospheric and upper atmospheric phenomena. For example, stratospheric warmings correlate with ionospheric perturbations, and with reductions in polar mesospheric cloud occurrence. Understanding these so-called teleconnections is important for prediction of the near-space environment, and interpreting global change proxies. Tides and planetary waves are important agents for... Dr. Ruth Lieberman |
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16/05/2019 - 12:30
Active Galactic Nuclei and their large-scale structure: an eROSITA mock catalogue I will present in this talk a methodology to construct mock catalogs for X-ray selected AGN samples based on dark matter only N-body simulations. With this method, we predict observed AGN magnitudes in the UV, optical and NIR bands, by adopting a set of empirical spectral energy distributions. Dr. Johan Comparat |
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09/05/2019 - 12:30
Nonlinear dynamics of space and astrophysical plasmas Solar atmosphere and solar wind provide a unique laboratory for understanding the nonlinear dynamics of space and astrophysical plasmas. A quantitative analysis of the reconnection condition and the degree of intermittency reveals that rope–rope magnetic reconnection is the most likely site for genesis of interplanetary intermittency turbulence in this event. The dynamic pressure pulse resulting from this reconnection triggers the onset of a... Prof. Abraham Chian |
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03/05/2019 - 12:30
An ionised bubble before the epoch of re-ionisation In a search for Lyman Alpha sources around two spectroscopically confirmed star forming sources in the Subaru Deep Field, we have found some 45 low luminosity star forming galaxies. We find that these sources form a proto-cluster. Moreover, they reside in an ionised bubble of at least 12000 cMpc^3. Dr. Jose Miguel Rodriguez Espinosa |
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25/04/2019 - 12:30
Cosmic Dust in Planetary Atmospheres In this seminar I will describe the results of a large study designed to determine the input rate of cosmic dust to the terrestrial atmosphere, using a self-consistent treatment of cosmic dust from the outer solar system to the Earth’s surface. John Plane |
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12/04/2019 - 12:30
Imaging a black hole with the Event Horizon Telescope We have imaged the shadow of the central black hole in the radiogalaxy M87. This required assembling the Event Horizon Telescope, a global VLBI array observing at a wavelength of 1.3 mm capable of achieving an angular resolution of 20 microarcsecond (uas). We have resolved the central region of M87 into an asymmetric bright emission ring with a diameter of 42+-3 uas, which is circular and encompass a central depression in brightness with a flux... Dr. Jose Luis Gómez |
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04/04/2019 - 12:30
Is there still hope for discovering new physics in the Euclid era? The new generation of cosmological surveys like DESI, J-PAS and Euclid will measure the effect of dark energy on the expansion history of the universe. They will obtain optical and NIR spectra for tens of millions of galaxies and quasars, constructing a 3-D map spanning the nearby universe to 10 billion light-years, and will provide an accurate determination of the distance-redshift relation. I will review the latest distance scale measurements... Dr. Francisco Prada |
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28/03/2019 - 12:30
CTA: the Cherenkov Telescope Observatory for VHE Gamma Ray astronomy The Cherenkov Telescope Array (CTA), currently in construction, shall be the Cherenkov Telescope Observatory for VHE Gamma Ray Astronomy, and shall provide crucial data for the understanding of the extreme universe in the recently open multimessenger era. The goals and characteristics of the project will be reviewed, and the current status and plans presented. In addition, the crucial role of the Spanish community in this project will be... Manel Martinez |
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21/03/2019 - 12:30
Primer Plan de igualdad del IAA El objetivo de esta charla es presentar a todo el Instituto el I Plan de Igualdad de género. Plantearé las motivaciones y necesidades de contar con un plan de igualdad en un instituto de investigación, cuando ya el CSIC está preparando su III Plan de Igualdad. Revisaré los objetivos y marco de actuación de los planes del CSIC y mi visión de cómo el nuestro se hace para complementar algunas acciones no contempladas dentro de esa estructura... Dra. Josefa Masegosa |
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13/03/2019 - 12:30
Signatures of a jet cocoon in early spectra of a supernova associated with a gamma-ray burst Thanks to a detailed observational monitoring and an accurate spectral synthesis analysis of the early phases of SN 2017iuk, we conclude that these features originate from the mildly relativistic hot cocoon that is generated by the GRB ultra-relativistic jet, while it is expanding and decelerating into the medium surrounding the progenitor star. Dr. Luca Izzo |
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07/03/2019 - 12:30
High-velocity Molecular Clouds near the Galactic Center The central region of our Galaxy contains a huge amount of molecular gas. This region is often referred to as the "central molecular zone (CMZ)". The recent ALMA observations toward this HVCC revealed orbital motions around an invisible massive object, which is probably an intermediate-mass black hole. Yuhei Iwata |
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21/02/2019 - 12:30
Planck Cosmological Legacy: the next CMB polarization experiments The results and products derived from the third and final release of data from the Planck mission will be reviewed with emphasis on the implications for cosmology. Prof. Enrique Martinez |
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19/02/2019 - 12:00
Instrument development at the AAO The AAO is a consortium of three Australian instrumentation groups, based at Macquarie University, University of Sydney, and the Australian National University. Collectively, the consortium has delivered hundreds of instrument projects for astronomy, for our own telescopes and internationally. We have particular expertise in fibre positioners and fibre systems, spectrographs, astro-photonics, and adaptive optics. I will give an... Jon Lawrence |
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13/02/2019 - 12:30
THOT: Dating stars Life, planets, exoplanetary systems, stars, and our galaxy evolve with time, and the best and sometimes only way for understanding this evolution is dating stars. THOT is a Marie Curie Project devoted to gathering and updating all the stellar dating techniques into a single computational tool. In this presentation, I will present some of the most promising techniques for stellar dating, and show the current main contributions of this project (... Dr. Andres Moya |
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07/02/2019 - 12:30
Mars UV atmospheric emissions In this talk we will summarize our recent analysis of observations performed by the instrument SPICAM on the Mars Express mission on the dayside of the planet, and by the instrument IUVS on board MAVEN on the nightside of the planet. Dr. Francisco González Galindo |
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24/01/2019 - 12:30
Observing Planet Formation with the VLA in the era of ALMA In only four years, ALMA has radically changed the field of planet formation. We are currently obtaining very detailed images of the dust emission in protoplanetary disks with an unprecedent sensitivity and high angular resolution. Dr. Carlos Carrasco |
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17/01/2019 - 12:30
AGN TORUS DETECTABILITY AT SUB-MILLIMETER WAVELENGTHS: WHAT TO EXPECT FROM ALMA CONTINUUM DATA In this talk I will show you a study on the detectability of the emission associated with the AGN dusty structure at sub-mm wavelengths using ALMA, in a theoretical and observational way. Dr. Alice Pasetto |
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10/01/2019 - 12:30
The road to the Square Kilometre Array New and existing facilities operating at submm-to-m wavelengths are shedding new light on the formation of planets, black holes, and even the first galaxies. These telescopes provide the test bed for the technological advancements required to build the next generation of large radio telescopes, like the Square Kilometre Array (SKA). Dr. Jeff Wagg |
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13/12/2018 - 12:30
RESULTS FROM THE RADIOASTRON AGN POLARIZATION KSP: A LIMB-BRIGHTENED JET IN 3C273 The RadioAstron active galactic nuclei (AGN) polarization Key Science Project (KSP) aims at exploiting the unprecedented angular resolution provided by RadioAstron to study jet launching/collimation and magnetic-field configuration in AGN jets. The targets of our KSP are some of the most powerful blazars in the sky. I will present observations at 1.4 GHz and 22 GHz of 3C273, performed in 2014, designed to reach a maximum baseline of... Gabriele Bruni |
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29/11/2018 - 12:30
Spirals, rings and arcs around evolved stars We searched the complete archive of the HST and Spitzer to characterise rings and arcs around evolved low-mass stars (AGB stars, proto-PNe and PNe), study their physical properties and address their formation mechanisms. In this talk, we present the observational results of our survey, the predictions of simple radiation-hydrodynamic simulations as well as the future of the project. Dr. Jesús Toala |
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22/11/2018 - 12:30
Time variable processes of Sagittarius A*, the massive black hole at the centre of the Milky Way Date: 22/11/2018 . 12:30 hrs Speaker: Dr. Gunther Witzel Affiliation: Max-Planck-Institute for Radioastronomy, Bonn, Germany. Dr. Gunther Witzel |
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15/11/2018 - 12:30
The habitability of stagnant-lid Earths around dwarf stars We show that Earth-like stagnant-lid planets allow for habitable surface conditions within a continuous habitable zone that is dependent on interior composition. Dra. Mareike Godolt |
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08/11/2018 - 12:30
What we (don't) know about the trans-Neptunian objects The first trans-Neptunian object was discovered in 1930 and we waited over 60 years to discover the second one. The discovery of Albion (a.k.a. 1992QB1) enticed the minor bodies community to characterize the new population, called collectively as trans-Neptunian objects (TNOs). Today we know the existence of over 2,000 objects and counting. Nevertheless, it seems that we have reached our technological limitation in terms of observational studies... Dr. Alvaro Alvarez-Candal |
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25/10/2018 - 12:30
The Arp299B-AT1 puzzle: First resolved imaging of a tidal disruption event Date: 25/10/2018 . 12:30 hrs Speaker: Dr. Miguel Angel Pérez-Torres Affiliation: IAA-CSIC, Spain Dr. Miguel Angel Pérez-Torres |
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18/10/2018 - 12:30
An unusual autumn Elevated Stratopause Event (ESE) IAA Seminar Date: 18/10/2018 . 12:30 hrs Speaker: Dr. Maya Garcia Comas Dr. Maya García Comás |
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11/10/2018 - 12:30
The planetary nebula HuBi 1, a rebel with a cause Planetary nebulae, the descendants of low- and intermediate-mass stars, have characteristic onion-like ionization structure, with the highest ionization species closer to the central star. This is true for all planetary nebulae, but HuBi 1, which shows an inverted ionization inner shell. There is a reason for this oddity, a peculiar stellar evolution of its central star, which makes HuBi 1 the missing link of the population of cool C-rich... Dr. Martin Guerrero |
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04/10/2018 - 12:30
The European VLBI Network (EVN) and user cases to improve your science The European VLBI Network (EVN) is a network of radio telescopes located primarily in Europe and Asia, with additional antennas in South Africa and Puerto Rico. The combination of such extended network of telescopes provides an extremely high angular resolution (down to milliarcsecond scales). In addition to that, and given its unparalleled sensitivity on this type of observations, the EVN becomes a genuine instrument to observe an enormous... Dr. Benito Marcote |
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27/09/2018 - 12:30
ASKAP and HI in Galaxies I will divide my talk into three parts, starting with an overview of CSIRO’s Australia Telescope National Facility (ATNF), especially our telescopes (ASKAP... Baerbel Koribalski |
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20/09/2018 - 12:30
Slender CaiiH fibrils observed by SUNRISE II The special observing conditions of the SUNRISE observatory allow obtaining observations in the UV with unprecedented temporal stability and spatial resolution. On its second scientific flight, the Sunrise Filter Imager (SUFI) was used to record a time series of narrow-band intensity images in the CaiiH line for approximately one hour at a cadence of 7 seconds. This unique dataset enabled us to characterize the morphological properties of 598... Dr. Ricardo Gafeira |
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13/09/2018 - 12:30
The peculiar case of the active galactic nuclei in PBC J2333.9-2343 Under unification schemes, active galactic nuclei (AGN) can be explained by orientation effects. However, some sources show properties at different frequencies that led to incongruent classifications and cannot be explained by such unification scheme. This is the case of PBC J2333.9-2343; its optical spectrum is of a type 2 AGN but its X-ray spectrum does not show signs of absorption, and in the radio it has many features typical of a blazar but... Dr. Lorena Hernández-García |
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06/09/2018 - 12:30
Optical spectroscopy of local type-1 AGN LINERs The Balmer emission originated in the broad line region (BLR) of active galactic nuclei (AGNs) could be either weak and difficult to detect, or even absent, for low luminosity AGNs, as low ionization nuclear emission-line regions (LINERs). This makes LINERs challenging to fit in the AGN unification scheme. Moreover, a long debate can be found in the literature proposing different ionization sources at the origin of optical emission lines and no... Dr. Sara Cazzoli |
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28/06/2018 - 12:30
Extreme quasars at high redshift The study of the AGN accreting close to the Eddington limit (L/LEdd~1) has taken an important role, due to their potential use as standard candles for cosmological applications. With the purpose to understand the physics of extreme quasar, we perform a spectroscopic analysis of a sample of highly accreting quasars at high redshift (z~2–3). Our sample were observed with the OSIRIS spectrograph on the GTC 10.4 m telescope located at the... Dr. Maryloli Martinez Aldama |
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22/06/2018 - 12:30
What do environments can tell us about supernovae? The advent of Integral Field Spectroscopy (IFS) applied to supernova (SN) environmental studies have shown the potential of this technique to directly characterize the galactic environmental parameters at SN locations, compare them to those at different locations of the galaxy, and put constraints on progenitor stars for different SN types. Here, I will summarize past works and present ongoing efforts, including the PISCO compilation and the... Dr. Luis Galbany |
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21/06/2018 - 12:30
Blazar Science with POLAMI: Polarimetric Monitoring of AGN at Millimeter Wavelengths A pioneering long term program at the IRAM 30m Telescope dubbed POLAMI (Polarimetric Monitoring of AGN with Millimetre Wavelengths) observes the 4 Stokes parameters of the continuum emission at 3.5 and 1.3 mm, with a time sampling of ~2 weeks for the ~40 brighter sources in the northern sky. The XPOL polarimeter, connected to different heterodyne receiver sets, has been used since the beginning of our observations. In this talk I will introduce... Dr. Iván Agudo |