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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201 - 250 de un total de 1183


26/11/2019 - 12:30
Inverse Compton emission revealed by observations up to TeV energies of GRB 190114C
The hunt for Gamma-Ray-Bursts (GRBs) at very high energy (VHE) started more than 20 years ago. A hint of emission was already claimed by Milagrito from the observations of GRB 970417. On 19 of January the Major Atmospheric Gamma Imaging Cherenkov (MAGIC) clearly detected GRB 190114C above 0.2 TeV. This is the first highly significant detection (over 50sigma reached in the first few tens of minutes after the burst) of a GRB at VHE. GRB190114C...
Dr. Elena Moretti
Institut de Física d'Altes Energies, Barcelona, España
19/11/2019 - 12:30
METIS instrument: the IMAGER and the SCAO
METIS is one of the three first instruments for the European Extremely Large Telescope (ELT), Europe’s next-generation ground-based telescope for optical and infrared wavelengths which is currently under construction at the ESO site at Cerro Armazones in Chile. METIS is the Mid-infrared ELT Imager and Spectrograph. This instrument will offer imaging, coronagraphy and medium-resolution spectroscopy over the full wavelength range from 3 to 14...
Dr. Concepción Cárdenas
Max-Planck-Institut für Astronomie, Germany
14/11/2019 - 12:30
SO-IAA Colloquium: Outflows and their feedback effect in galaxies
Galactic outflows are an essential component of galaxies' lifecycle. They regulate star formation and can even totally quench star formation in galaxies, hence transforming star forming galaxies into passive systems. I will review the properties of galactic outflows, their multi-phase nature, their driving mechanism, both in normal star forming galaxies and in galaxies hosting Active Galactic Nuclei, both in the local Universe and in...
Dr. Roberto Maiolino
Kavli Institute for Cosmology, University of Cambridge
12/11/2019 - 12:30
Study of the diversity of AGN dust models
The dust component of active galactic nuclei (AGN) produces a broad infrared spectral energy distribution (SED), whose power and shape depends on the fraction of the source absorbed, and the geometry of the absorber respectively. This emitting region is expected to be concentrated within the inner ∼5 pc of the AGN which makes almost impossible to image it with the current instruments. The study the infrared SED by comparison between infrared AGN...
Dr. Omaira González-Martín
IRyA - UNAM, Mexico
07/11/2019 - 12:30
SO-IAA Colloquium: Characterization of (exo)Planetary Atmospheres
Characterization of planetary atmospheres has always been a challenge. While the next generation of facilities, such as ELT, JWST, and ARIEL, will improve our understanding of planetary atmospheres, the number of well-characterized exoplanet atmospheres is expected to remain limited. Large-scale simulations assist us with this shortcoming by predicting the diversity of the planetary atmospheres, connecting the spare observational measurements,...
Dr. Karan Molaverdikhani
Heidelberg University / MPIA, Germany
31/10/2019 - 12:30
SO-IAA Colloquium: Neutral and molecular gas outflows as tracers of the impact of radio jets
Our view of the gas and its physical conditions in the central region of AGN has been enriched by the discover of fast and massive outflows of HI and molecular gas. These outflows can be driven by radiation/winds but also by the interaction of the radio plasma with the ISM. Understanding the origin and quantifying their impact requires to trace their location and derive their physical conditions (density of the gas, mass, mass outflow rate and...
Dr. Raffaella Morganti
ASTRON, the Netherlands Institute for Radio Astronomy and Kapteyn Astronomical Institute, University of Groningen
29/10/2019 - 12:30
Nebular HeII emission from spatially resolved metal-poor star-forming galaxies
Nebular HeII1640,4686 emission, observed to be more frequent in high-z galaxies than locally, is indicative of far harder ionizing spectrum than that seen in nearby systems. Star-forming galaxies with lower metal content tend to have a larger nebular HeII intensities compared to those with higher metallicities. This agrees with the expected harder spectral energy distribution at the lower metallicities typical in the early universe. Theoretical...
Dra. Carolina Kehrig
24/10/2019 - 12:30
Young low-mass galaxies with extreme emission-line properties are ubiquitous at high redshift and they are believed to play a key role in cosmic reionisation and the early growth of galaxies at z>4-6. However, a detailed characterisation of their physical properties, critical for a better understanding of these two outstanding problems, is yet not possible. A unique population of lower-z analogues of these primeval systems, dubbed Green Pea (GP...
Dr. Ricardo Amorin
Universidad de La Serena , Chile
23/10/2019 - 12:30
Molecular spectroscopy at high resolution for everyone
Molecular observations at high resolution is being revolutionized by the success of ALMA and the upcoming advent of SKA. In this talk I will explain the recent progress in the field of molecular observations in the central regions of galaxies and the big steps that we are currently making in the use and understanding of molecular tracers as a proxy to buried physical processes in active galaxies. I will show some preliminary results from the...
Dr. Sergio Martín Ruiz
European Southern Observatory - Joint ALMA Observatory, Chile
22/10/2019 - 12:30
Data mining Gaia DR2: the quest for Pre-Main Sequence Stars (and their discs)
As the birth-sites of planets, protoplanetary discs have become the object of intense study during the last years. Constraining their typical lifetimes, masses and/or sizes is crucial to understand the process of planet formation. These objects are a natural by-product of early stellar evolution, and therefore a high fraction of Pre-Main Sequence Stars (PMS) are surrounded by a protoplanetary disc. The current census of PMS (and discs) has been...
Dr. Héctor Cánovas
Gaia Science Operations Centre, ESAC, Spain
17/10/2019 - 12:30
SO-IAA Colloquium: What's is the metallicity of cool dwarf stars?
Cool dwarfs are the most numerous stars in the Galaxy and they account for most of its baryonic mass. However, they are likely the least understood main sequence stars. Their complex atmospheres, due to their low temperatures and high surface gravities, have made their spectroscopic study a hard task. Until recently, their basic physical properties, such as radii and mass, were poorly constrained due to the lack of empirical data. Stellar...
Bárbara Rojas-Ayala
Universidad Andres Bello, Santiago de Chile, Chile (UNAB)
10/10/2019 - 12:30
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
Universidad de Valencia y Real Academia de Ciencias
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
European Space Agency (ESA)
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
Instituto de Astronomía en Ensenada, UNAM, México
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
Cranfield Precision , UK
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
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
Universidad Autónoma de Madrid
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
UNAM, Mexico
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
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
Instituto de Calculo Astronomico, Universidad de Heidelberg, Alemania
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
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
Instituto de Astronomia, UNAM, Ensenada, Mexico
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
Purple Mountain Observatory, Nanjing, P. R. China
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
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
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.
Academia Sinica Institute of Astronomy and Astrophysics (ASIAA) Taipei, Taiwan
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
17/05/2019 - 12:30
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
Goddard Space Flight Center
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
MPE, Garching, Germany
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
University of Adelaide, Australia
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
Instituto de Astrofísica de Canarias
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
School of Chemistry, University of Leeds, United Kingdom
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
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
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
IFAE-BIST, Barcelona, España
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
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
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
Keio University, Japan
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
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
Head of Technology, Australian Astronomical Observatory
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
School of Physics and Astronomy, University of Birmingham, UK.
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
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
Instituto de Radioastronomia y Astrofisica (IRyA-UNAM), México
17/01/2019 - 12:30
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
CRYA, México
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
SKA HQ in Manchester, UK.
13/12/2018 - 12:30
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
INAF-IAPS, Rome, Italy
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
Instituto de Radioastronomía y Astrofísica IRyA - UNAM Campus Morelia, México.
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
Max-Planck-Institute for Radioastronomy, Bonn, Germany.
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
Centre of Astronomy and Astrophysics, University of Technology in Berlin, Germany
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
Observatorio Nacional de Rio de Janeiro, Brasil.