Seminarios

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.

Instrucciones
Para más información contactar con duffard (at) iaa.es.

1 - 50 de un total de 1082



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10/02/2022 - 12:30
Results on Uchuu
TBP
Julia Ereza
IAA - CSIC
03/02/2022 - 12:30
SO Webloquio: The Milky Way's young substellar population
Young clusters and star forming regions are home to a large number of substellar objects with masses below the hydrogen-burning limit at 0.075 MSun. Most of our knowledge about their populations comes from nearby regions (d
Dra Koraljka Muzic
CENTRA - Center for Astrophysics and Gravitation, University of Lisbon, Portugal
27/01/2022 - 12:30
The continuous rise of bulges out of galactic disks
A tantalizing enigma in extragalactic astronomy concerns the chronology and driving mechanisms of the buildup of the central luminosity excess (bulge) in spiral galaxies like our Milky Way, i.e. in systems referred to as late-type galaxies (LTGs) in the Hubble classification scheme. The standard scenario envisages a two-phase galaxy formation process, with the bulge assembling first in a quick and violent quasi-monolithic episode, with the disk...
Dr. Iris Breda
IAA-CSIC, Granada , Spain
20/01/2022 - 12:30
TBP
TBP
Dra. Banafsheh Shahzamanian
IAA-CSIC, Granada , Spain
13/01/2022 - 12:30
TBP
TBP
Dr Alvaro Alvarez-Candal
IAA-CSIC, Granada, Spain
11/01/2022 - 12:30
SO Webloquio:
TBP
TBP
TBP
16/12/2021 - 12:30
TBD
TBD
Dr Ruben Fedriani
Chalmers University of Technology, Gothenburg, Sweden
09/12/2021 - 12:30
SO Webloquio: Unveiling the unseen magnetized universe with MeerKAT
Galaxy clusters are known to harbour magnetic fields, the nature of which remains unresolved. Intra-cluster magnetic fields can be observed at the density contact discontinuity formed by cool and dense plasma running into hot ambient plasma, and the discontinuity exists near the second brightest galaxy, MRC0600-399, in the merging galaxy cluster Abell 3376 (redshift 0.0461). Elongated X-ray emission in the east–west direction shows a comet-like...
Dr. James Chibueze
North West University, Potchefstroom, South Africa
02/12/2021 - 12:30
The PUMA project. Mergers and feedback in local ULIRGs resolved by ALMA and MUSE+AO
Galaxy mergers and interactions have a key role in the evolution of galaxies, specially at high-z when they were more common than today. Mergers trigger starbursts and AGN activity, which are both regulated by negative feedback processes, as well as can turn spiral galaxies into massive quiescent objects. The local counterparts of these major interactions and mergers are local ULIRGs (L(IR)/Lsun > 1e12) which, thanks to their proximity, allow...
Dr. Miguel Pereira Santaella
CAB-INTA CSIC, MAdrid, España
30/11/2021 - 12:30
The RoboPol Program: Optical Polarimetric Monitoring of Blazars
Blazars are a subclass of Active Galactic Nuclei with relativistic jets pointing at us. For this reason the highly amplified polarized synchrotron emission from their jets dominates in the optical band. Typically, the electric vector position angle (EVPA) of the optical polarized emission in blazars varies in an erratic way. However, in rare cases the EVPA displays long, smooth and monotonic rotations. Being puzzled by this phenomenon missing a...
Dr. Dimitriy Blinov
Institute of Astrophysics, Foundation of Research and Technology - Hellas, Greece
25/11/2021 - 12:30
TBP
TBP
Dra. Inmaculada Dominguez
TBP
23/11/2021 - 12:30
Search for MIlli-LEnses (SMILE) to discriminate between dark matter models
Projects aimed at characterising dark matter properties make use of very different approaches. One such approach is to look for strong gravitational lens systems. Gravitational lensed images with angular separation on milliarcsecond scales probe gravitational lens systems where the lens is a compact object with mass in the range 10^6-10^9 solar masses, i.e a supermassive compact object (SMCO). This mass range is particularly critical for the...
Dra. Carolina Casadio
Institute of Astrophysics, Foundation of Research and Technology - Hellas, Greece
18/11/2021 - 12:30
SO Webloquio: To be provided
To be provided
Dr Lidia Tasca
to be provided
11/11/2021 - 12:30
SO Webloquio: Stellar winds and their effects on exoplanets
As the wind outflows from a star, it permeates the interplanetary medium, interacting with any planet it encounters. In this talk I will review some recent works on winds of low-mass stars and discuss the impact stellar winds can have on surrounding exoplanets. Compared to the physical interactions known to take place between the solar wind and the solar system planets, the interaction between stellar winds and exoplanets can be significantly...
Dra Aline Vidotto
Leiden University, Netherlands
04/11/2021 - 12:30
TBP
TBP
Gines Martinez Solaeche
IAA-CSIC, Granada, España
28/10/2021 - 12:30
High-dispersion IFS of PNe: Seen the Unseen
TBP
Dr. Martin Guerrero
IAA-CSIC, Granada, Spain
21/10/2021 - 12:30
Unveiling the dynamical stage of galaxy clusters through the intracluster light
The intracluster light (ICL) is the most unexplored component of galaxy clusters. It is defined as a low surface brightness, extended emission composed by stars that are bound by the potential of the cluster but do not belong to any galaxy in particular. Simulations predict that minor and major mergers can mainly drive the formation of ICL, specially for z
Dra. Yolanda Jimenez-Teja
Instituto de Astrofísica de Andalucía - CSIC, Granada, Spain
14/10/2021 - 12:30
The miniJPAS survey: the galaxy populations in the miniJPAS cluster mJPC2470-1771
Galaxy clusters are one of the largest structures in the Universe. Due to the interaction among the galaxy members, they are a great laboratory to study the role of the environment in galaxy evolution. J-PAS survey will soon start to scan thousands of square degrees in the sky, and with its large great field of view (4.2 square degrees) and filter system (56 narrowband filters and 4 broadband filters in the optical spectral range) will provide...
Julio Rodriguez Martin
IAA-CSIC, Granada, España
07/10/2021 - 12:30
X-ray binary accretion states in AGN? Sensing the accretion disc of supermassive black holes with mid-IR nebular lines
Accretion states, which are universally observed in stellar-mass black holes in X-ray binaries, are also anticipated in active galactic nuclei (AGN). This is the case at low luminosities, when the jet-corona coupling dominates the energy output in both populations. Previous attempts to extend this framework to a wider AGN population have been extremely challenging due to heavy hydrogen absorption of the accretion disc continuum and starlight...
Dr Juan Antonio Fernández Ontiveros
CEFCA (Centro de Estudios de Física del Cosmos de Aragón), Teruel, España
16/09/2021 - 12:30
Precision cosmology: now what?
The standard cosmological model (the LCDM model) has been established and its parameters are now measured with unprecedented precision. This model successfully describes observations from widely different epochs of the Universe, from primordial nucleosynthesis all the way to the present day. However, there is a big difference between modelling and understanding. The next decade will see the era of large surveys; a large coordinated effort of...
Dra. Licia Verde
Instituto de Ciencias del Cosmos (ICC), Universidad de Barcelona Barcelona, Spain
09/09/2021 - 17:00
SO Webloquio: A new look at our star: the Daniel K. Inouye Solar Telescope
The Sun represents a template for much of our understanding of the workings of a "cool" star, and its proximity allows us to observe exquisite details at its surface, with current facilities routinely reaching resolutions of few hundreds of km on the solar disk. Yet, many questions still linger, in particular concerning the actual mechanism(s) that create and maintain a hot outer atmosphere (chromosphere, transition region and corona) as well as...
Dr. Gianna Cauzzi
National Solar Observatory (Boulder, CO, USA)
02/09/2021 - 15:00
The Lucy mission: exploring the unexplored
Lucy is planned to launch in 2021 on a United Launch Alliance Atlas V launch vehicle, after which it will gain two gravity assists from Earth; one in 2022, and one in 2024. In 2025, it will fly by the inner main- belt asteroid (52246) Donaldjohanson, which was named after the discoverer of the Lucy hominid fossil. In 2027, it will arrive at the L4 Trojan cloud (the Greek camp of asteroids that orbits about 60° ahead of Jupiter), where it will...
Dr. Adriana Ocampo
NASA HQ, Planetary Science Division, Washington DC, USA
22/07/2021 - 12:30
Revealing cosmic magnetism with the Square Kilometre Array and its pathfinders
Magnetism is an enigmatic but crucial element of our Universe. The structure and strength of magnetic fields are important for a full understanding of astrophysics over a tremendous range of scales: from stellar systems, to star forming regions, the properties and evolution of individual galaxies, galaxy groups and clusters, and even as a major element of the Cosmic Web. The Square Kilometre Array (SKA) promises to deliver a revolutionary view...
Dr. George Heald
CSIRO Astronomy and Space Science, Australia
08/07/2021 - 12:30
SO Colloquium: TeV Halos and their connection to the Leptonic Cosmic Ray flux measured at the Earth
The origin and propagation of cosmic rays (CRs) is one of the most important questions in astroparticle physics nowadays. CRs generated by known sources also serve as background to those putatively generated by more exotic phenomena such as dark matter. Apart from the known electrons of primary origin and positrons of secondary one, pulsars and sources powered by them are one of the main candidates to contribute to the total amount of CR...
Dr. Rubén López-Coto
Fellini Researcher, INFN Padova, Italy
01/07/2021 - 12:30
SO Colloquium: Interstellar planetesimals: 1I/Oumuamua and 2I/Borisov
Extensive surveys of extrasolar planets and of circumstellar disks around nearby stars show that planets and dust-producing planetesimals, similar to the asteroids, Kuiper belt objects and comets in our solar system, are ubiquitous around others stars. The planetesimal population of the young solar system was very numerous initially but the majority of the objects ended up ejected due to gravitational perturbations with the planets and other...
Dra. Amaya Moro-Martín
Space Telescope Science Institute, Baltimore, Maryland, USA
24/06/2021 - 12:30
SO Webloquio: Asteroid sample return: A laboratory perspective
The new generation of sample return missions from small bodies is delivering to us fresh witnesses from the early Solar System. In this context, laboratory studies play a double role: on one hand, in-depth laboratory analysis of retrieved samples using state-of-the-art techniques give us an unprecedentedly detailed look at the formation and evolution of organic materials in asteroids; on the other hand, in the laboratory we can perform...
Dr. Rosario Brunetto
Université Paris-Saclay, CNRS, Institut d'Astrophysique Spatiale, Orsay, France
17/06/2021 - 12:30
SO Webloquio: Star-formation and accretion in galaxies from near to far: the LeMMINGs and eMERGE e-MERLIN legacy programmes
Radio emission provides a uniquely powerful and unobscured probe of the two key physical processes underway in, and powering, galaxies and their evolution: Accretion on to their central SMBH, and star-formation processes. To explore these processes, and their role in galaxy evolution, we require very high resolution (sub-arcsecond or better), sensitive imaging at radio wavelengths across large samples of galaxies in both the local and distant...
Dr. Rob Beswick
Jodrell Bank Centre for Astrophysics, The University of Manchester
10/06/2021 - 12:30
SO Webloquio: Auroral Radio Emission in stars and exoplanetary systems
In recent years, an interesting type of coherent radio emission has been detected in a wide variety of stars across the HR diagram, from hot magnetic A-B MS stars to Ultra Cool dwarfs: the Auroral Radio Emission (ARE), previously observed by spacecrafts in the magnetosphere of planets of the Solar System. Very different objects are showing the same phenomenon. What do they have in common? The first star with ARE was CU Virginis, an early type...
Dr. Corrado Trigilio
Osservatorio Astrofisico di Catania (INAF-OACT)
08/06/2021 - 16:00
K-band interferometric imaging of the M-type Mira star ‘R Car’
The final stage of low to intermediate-mass stars, also known as the asymptotic giant branch (AGB), presents circumstellar envelopes (CSE); however the mechanisms that lead to the formation of these structures, at least in M-type AGBs, are still not well understood. In order to grasp the characteristics of the CSE, it has been found that the CO molecule plays an important role due to its stability against dissociation, making it a tracer of the...
M.Sc. Abel Rosales-Guzmán
Instituto de Astronomía, UNAM, México
27/05/2021 - 17:00
SO Webloquio: A Spanish in Boulder
The opportunity to lead the US National Solar Observatory (managed by AURA) since 2013 has allowed me to understand the differences in how R...
Dr. Valentin Martínez Pillet
National Solar Observatory, Boulder, Colorado, USA.
20/05/2021 - 12:30
SO WebLoquio: Regularly-spaced 8 micron cores as tracers of the earliest stages of star formation in the spiral arms of nearby galaxies
Archival Spitzer Space Telescope images of most nearby spiral galaxies show prominent 8 micron emission cores when viewed with an unsharp mask technique. These cores have the IR colors of young star-forming regions, typically a million years old, behind several tens of magnitudes of optical extinction. They are usually invisible in optical images, and yet the sum of their masses divided by their likely age is comparable to the total star...
Dr. Bruce Elmegreen
IBM Watson Research Center
13/05/2021 - 12:30
SO Webloquio: The HIRES/ELT consortium, instrument and science
We present the results from the phase A study of ELT-HIRES, an optical-infrared, high-resolution spectrograph for ELT, which has just been completed by a consortium of 30 institutes from 12 countries forming a team of about 200 scientists and engineers. The top science cases of ELT-HIRES will be the detection of life signatures from exoplanet atmospheres, tests on the stability of Nature's fundamental couplings, the direct detection of the...
Dr. Alessandro Marconi
University of Florence - INAF, Italy
11/05/2021 - 12:30
Is the Bremer Deep Field Ionised at z=7?
The talk will show that the population of star forming galaxies in the Bremer Deep Field (BDF) has formed two large ionised bubbles. The sources in the BDF have been completed with a set of expected, though not detected, low luminosity sources at z ~ 7. We have estimated the number of ionising photons produced per second by the different star forming galaxies in the BDF and have compared it with the number that would be required to reionise...
Jose Miguel Rodriguez Espinosa
IAC, España
06/05/2021 - 12:30
SO Webloquio: Nuclear star clusters
I review the current knowledge about nuclear star clusters (NSCs), and the spectacularly dense and massive assemblies of stars found at the centers of most galaxies. Understanding the formation, growth, and ultimate fate of NSCs is crucial for a complete picture of galaxy evolution. There is a clear transition mass in galaxies of ∼ 10^9 Msol where the characteristics of NSCs change. I argue that at lower masses, NSCs are formed primarily from...
Dr. Nadine Neumayer
Max Planck Institute for Astronomy, Germany
04/05/2021 - 12:30
SO Web-Colloquia: Thematic area 9 of the CSIC’s new White Book: Understanding the basic components of the Universe, its structure and evolution
CSIC is about to publish a White Book to define its scientific strategy for the coming decades. The White Book contains chapters on 14 different thematic areas. One of the main goals of this exercise is to increase collaboration between research groups and institutes of the CSIC. Particular value is set on inter- and cross-disciplinary work. Each thematic area defines a set of “challenges”, key scientific questions for the coming decade(s) in...
Dr. María José Costa and Dr. Rainer Schödel
IFIC-CSIC & IAA-CSIC
29/04/2021 - 12:30
Extreme Blazars
Blazars are jetted active Galactic Nuclei with the jet axis oriented close to the line of sight of the observer. Non-thermal emission processes in the jet cover the whole electromagnetic spectrum from radio wavelengths to TeV gamma rays, with a characteristic double-humped Spectral Energy Distribution (SED). Relativistic amplification effects on the observed fluxes make their jets ideal candidates for detection at any wavelength. A physically...
Dr. Giacomo Bonnoli
IAA - CSIC, Granada, Spain
27/04/2021 - 12:30
SO Webloquio: Chaos and Instabilities in Planetary Systems
The aim of this talk is to discuss recent results on the estimation of instability times through Shannon entropy and its application to planetary systems. We will analyze the complex relation between chaos and orbital instability, and how each is able to provide important information about the dynamical evolution of the system. Finally, we will analyze how different well known planetary systems These concepts will then be applied to several...
Dr Cristian Beauge
Observatorio de Córdoba, Argentina
22/04/2021 - 12:30
Gas-poor clusters: what kind of beasts are they?
The known variety of galaxy clusters is constantly increasing with our progress in understanding the severity of selection effects on observational samples and with obvious implications on cosmology and cluster physics. In the talk, after a general introduction on galaxy clusters and a reminder on selection effects, I present perhaps the first X-ray unbiased sample of clusters with known masses and X-ray follow-up, its more variegate nature...
Dr. Stefano Andreon
INAF-OA Brera (Milan, Italy)
15/04/2021 - 12:30
Unveiling the low surface brightness Universe
From the beginning of time, humankind has wondered what lies behind the darkness of the night sky. From the pre-telescope era to the present, our ability to see the lowest surface brightness details in the sky has improved by a factor of one million. In this talk, I describe how our vision of the sky has changed over time and how the recent developments in ultra deep imaging have speed up our capacity to discover new objects and structures in...
Dr. Ignacio Trujillo
Instituto de Astrofísica de Canarias, Spain
08/04/2021 - 12:30
On the effects of Initial Mass function on the galactic chemical enrichment: the role of Pair Instability Supernovae
We built new sets of chemical yields from massive and very massive stars up to Mi ~ 350 Msun, by combining the wind ejecta extracted from our hydrostatic stellar evolution models with explosion ejecta from the literature. Using a simple chemical evolution code we analyse the effects of adopting different yield tables by comparing predictions against observations of stars in the solar vicinity. Our study indicates that PISN played a significant...
Dr. Sabyasachi Goswami
Dpt. of Astrophysics & Cosmology, SISSA, Triste, Italy
06/04/2021 - 13:30
SO Webloquio: James Webb Space Telescope Capabilities for Planet and Exoplanet Observations
JWST, scheduled for launch in October, will bring a new generation of instruments, infrared detectors, and a passively cooled 6.5 m primary mirror to space-based astronomy. I will discuss its imaging and spectroscopic modes, which cover wavelengths from 0.6 - 28.5 microns, and the observatory's moving-target tracking, and coronagraphic and time-series modes for direct or transit observations of exoplanets. I will show some statistics for the...
Dr. John Stansberry
Space Telescope Science Institute, Baltimore, USA
30/03/2021 - 12:30
SO Webloquio: Star-forming Complexes in Local Mergers and High Redshift Galaxies
Disk galaxies at high redshift contain star-forming complexes, or clumps, whose masses and sizes far exceed those of clumps in local non-interacting galaxies. However, our recent Hubble Space Telescope observations reveal that local merging galaxies can form massive clumps like those at high z, with the same range of physical size, surface density, age, and star formation rate. These similarities, combined with the loss at high redshift of low...
Dr. Debra Elmegreen
Vassar College, NY, USA
25/03/2021 - 12:30
SO Webloquio: Searching for the formation mechanisms of brown dwarfs
New generation of Submillimeter facilities in the North of Chile, like the APEX antenna and the Atacama Large Millimeter/submillimeter Array (ALMA), offers for the first time the possibility for studying the formation of stars, brown dwarfs, and planets with unprecedented sensitivity and angular resolution in the millimeter/submillimeter regime. The formation of Brown Dwarfs (BDs) is a debated topic of research. The most widely discussed...
Dr. Itziar de Gregorio Monsalvo
ESO Chile
18/03/2021 - 12:30
SO Webloquio: Polarimetry in the planetary sciences
The past few decades have been characterized by the rapid development of astronomical polarimetry that has resulted from new polarimetric instrumentation, new techniques and new theories. Such advances have aided the exploitation of polarimetry in areas ranging from solar system bodies to exoplanets and allowed the development of completely new fields of polarimetric exploration such as cometary nuclei, transneptunian objects, protoplanetary and...
Dr. Ricardo Gil-Hutton
Univ de San Juan, Argentina y CONICET
11/03/2021 - 12:30
Optical polarization of radio-quiet active galactic nuclei and its repercussion within the changing-look scenario
The core of Active Galactic Nuclei (AGN) remains under the resolution limit of the vast majority of current telescopes. However, polarimetry provide us with information of those unresolved regions, which would be inaccessible in natural light, such as the presence of dust, magnetic fields or scattering regions. This talk will be focused on the optical polarization properties of radio-quiet AGN and its relation with the geometry of the scattering...
Dr. Beatriz Agis González
Instituto de Astrofísica de Andalucía - CSIC, Granada, Spain
04/03/2021 - 12:30
SO Webloquio: Multiple stellar populations in globular clusters: Properties, origin, open questions
Globular clusters (GCs) are fascinating objects nearly as old as the Universe that provide insight on a large variety of astrophysical and cosmological processes. However, their formation and their early dynamical evolution are far from being understood. In particular, the classical paradigm describing GCs as large systems of coeval stars formed out of chemically homogeneous material has been definitively swept away by recent high-precision...
Dr. Corinne Charbonnel
Université de Genève, Switzerland
25/02/2021 - 12:30
SO Web-Colloquia: The exoplanet revolution
The wealth and diversity of planetary systems that have now been detected modified our perspective on planet formation as a whole and more specifically our place in the Univers. It also present an opportunity of historical perspectives and an irresistible call to look for signs of life on these new worlds as a way to explore our own origins. I will introduce the audience with the challenges and recent progresses in this new field of research and...
Dr Didier Queloz
Cavendish Lab., University of Cambridge, UK.
18/02/2021 - 12:30
SO Web-Colloquia: The Search for Advanced Extraterrestrial Civilisations via Anomalies in Astronomical Survey Data
Energy-intensive civilisations are likely to have a significant impact on both their local and extended environments – we already see evidence for this here on Earth. Advanced technical civilisations may reveal themselves to other civilisations by introducing anomalous signals into astronomical data. Artificial radio signals are perhaps the best known example but there are also many other possibilities e.g. excess infra-red emission due to waste...
Dr. Mike Garrett
Jodrell Bank Centre for Astrophysics, University of Manchester, UK
11/02/2021 - 12:30
SO Web-Colloquia: The influence of the star-forming environment on planetary systems
Planet formation occurs at the same time as star formation, and so the environments in which stars are born are also the birthplaces of planetary systems. Star forming regions are very dense, meaning that encounters between stars and planetary systems are common. Furthermore, the intense UV radiations fields from intermediate and massive stars can truncate, or destroy protoplanetary discs. In this talk, I will describe the detrimental effects of...
Dr. Richard Parker
The University of Sheffield
04/02/2021 - 12:30
PHANGS-Halpha : A narrow-band survey of nearby star-forming galaxies observed with ALMA
This work collects a representative sample of star-forming galaxies as part of a major effort the Physics at High Angular resolution in Nearby GalaxieS (PHANGS) collaboration has been making to build surveys with matched cloud-scale resolutions. Observations resolved at 50–150 pc are necessary to isolate individual Giant Molecular Clouds (GMCs) and HII regions to probe different phases of star formation from cold gas to stellar clusters. In this...
Dr. Alessandro Razza
Univ Chile and Univ Granada. Granada, Spain

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