Seminars

Scientific seminars exposed by scientists and technologists of the IAA and the many centers and research institutions who visit us. They show the intense scientific exchange, they are held at 12:30 every Thursday. Seminars are broadcasted live at IAA - CSIC Seminars Live.

 

Guidelines

For further information, please contact duffard (at) iaa.es.

Displaying 201 - 250 of 1026



Pages

12/11/2015 - 13:30
High Spatial Resolution 2D Nebular Abundances in Disk Galaxies
Galaxies evolve through the changes that face their various components such as the gas, dust, stars, and dark matter. Gas and dust are prime ingredients for the formation of new stars, and thereafter the massive stars newly formed will quickly modify the chemical composition of galaxies whereas low mass stars will take more time to contribute to the interstellar gas enrichment. Beside the stars, other processes occurring during the galaxies...
Laurie Rousseau-Nepton
08/10/2015 - 14:30
Dissecting a rare galaxy merger (the Hummingbird) with radio and mm-observations
The Bird is a luminous infrared galaxy product of a triple merger. Previous infrared observations have shown that the ongoing star formation in the least massive of the components (the head) outshines that of the mprimary nuclei (the heart and the body). This clashes with the commonly accepted major merger scenario in which the SF is expected to be higher in central compact regions. Here I will present preliminary results...
Cristina Romero-Cañizales
24/09/2015 - 14:30
Test In Space, your opportunity to experiment in orbit
Traditionally, experimentation in space has consisted in limited, expensive, long-term and complicated projects with hard requirements and restrictions. Currently, new space increases the possibilities to experiment in space for researchers from all kind of fields and, with TEST IN SPACE, this is also simple and fast. If you are interested in investigation under real space environment, you can just propose it to TEST IN SPACE. TEST IN SPACE...
tbd
17/09/2015 - 14:30
Baryon Acoustic Oscillations and the Expansion History of the Universe
The tiny inhomogeneities left over from the inflationary phase seeded the early Universe with primordial density perturbations. The photon-baryon fluid reacted to these perturbations by forming spherical pressure waves known as baryon acoustic oscillations (BAO). These waves propagated through the primordial plasma until the Universe became transparent to radiation, effectively stopping the dragging of the baryons by the photons. This left...
A. J. Cuesta, on behalf of the BOSS Collaboration
11/09/2015 - 14:30
Untold Stories of Andromeda: A Multi-wavelength View of The Nuclear Environment in M31
The Andromeda galaxy (M31), which harbors the nearest LINER and the closest stellar bulge accessible in the optical, is an ideal laboratory for studying the physical regulation of galactic nuclei, and in turn the co-evolution of super-massive black holes and their host galaxies. I will provide an overview of the stellar and interstellar components of the M31 bulge, as well as its dormant but otherwise well-known SMBH, M31*. I will introduce...
Prof. Zhiyuan Li
17/06/2015 - 14:30
Into Darkness: the seek for pulsars in the Galactic Centre
Pulsars are highly-magnetized rotating neutron stars that emit beams of electromagnetic emission. They are unique astronomical laboratories, not only because they are the most magnetized, densest, directly-observable objects in the Universe, but also because they act as extremely precise clocks located all over the Galaxy. The variety of science enabled by pulsars is very broad, from, e.g., limits on the Equation-of-...
Pablo Torne
15/06/2015 - 14:30
The influence of dynamics on airglow and constituents in the terrestrial mesopause region
In the terrestrial atmosphere, the mesopause region (~90 km height) is a transition region between the inviscid lower/middle atmosphere and the geomagnetically forced geospace. It is a region of strong dynamical forcing and where several constituents vary strongly with height one of which is atomic oxygen. Airglow, which is the result of naturally occurring chemiluminescence in the mesopause region involving exothermic reactions associated...
Prof. William Ward
11/06/2015 - 14:30
Ubiquitous magnetic flux emergence in the Sun: a fundamental process
The fundamental process of magnetic flux emergence happens continuously and everywhere over the solar surface, hence the ubiquitousness. No matter which spatial (granular, supergranular, active region) and temporal scale we look at buoyant magnetic field coming from the convection zone pierces the photosphere in the form of two opposite polarities and travels upwards through the solar atmosphere. We will describe the general characteristics...
Ada Ortiz Carbonell
09/06/2015 - 14:30
Massive Star Formation at the Puerto Varas Workshop
The recent decades have witnessed major advances in our understanding of the formation of solar-mass stars. However, the formation mechanisms of stars at the extremes  of the mass range, that is, on one hand very massive stars and in the other brown dwarfs, remain poorly understood. I will summarize the main results presented in a recent meeting on massive star formation that took place in Puerto Varas,...
Luis F. Rodriguez
28/05/2015 - 14:30
Observing the onset of outflow collimation in a massive protostar: assembling the puzzle
The current paradigm of star formation through accretion disks, and magnetohydrodynamically driven gas ejections, predicts the development of collimated outflows, rather than expansion without any preferential direction. We present radio continuum observations of the massive protostar W75N(B)-VLA 2, showing that it is a thermal, collimated ionized wind and that it has evolved in 18 years from a compact source into an elongated one. This...
José María Torrelles
14/05/2015 - 14:30
ASKAP Commissioning and Early Science
The Australian Square Kilometre Array Pathfinder (ASKAP) is a new generation low frequency (700-1800 MHz) interferometer capable of a wide instantaneous field of view of 30 square degrees, which is realised with the Phased Array Feed (PAF) technology. The first stage of the instrument, which consists of 6 first generation PAFs and is called Boolardy Enigeering Test Array (BETA), has been brought into operations...
Maxim Voronkov
30/04/2015 - 14:30
Seven Solutions: industria para las grandes infraestructuras científicas en Granada
Seven Solutions es una compañía tecnológica con amplia experiencia diseño de electrónica, software empotrado y mecánica. Colabora con empresas como Indra, Thales, Cibernos, Siemens o National Instruments. Seven Solutions cuenta con una dilatada experiencia en el campo de la industria de la ciencia, participando activamente en iniciativas open hardware como el OHWR.org....
Javier Díaz Alonso
16/04/2015 - 14:30
The San Pedro Mártir observatory and its UBVRI photometric survey of Galactic clusters
A short presentation of the San Pedro Martir Observatory will be given including its astroclimatic characteristics and its projects for the near future. I will then present the current status of our ongoing survey aimed at generating a homogeneous catalogue of physical parameters of stellar clusters in our Galaxy. It is expected that this data will allow the study of the properties of the galactic disk more accurately and reliability, helping...
Raul Michel Murillo
09/04/2015 - 14:30
Ionized gas in the CALIFA galaxies
We present here the most recent results we have obtained in our exploration of the gas abundances using the IFU data from the CALIFA survey. Using our own developed tools we have extracted the ionized gas properties of ~10.000 HII regions, in order to explore: (i) the relation between these properties and those of the host galaxies and the underlying stellar population; (ii) the local relation between the gas...
Sebastian Sanchez
26/03/2015 - 13:30
FROM ALHAMBRA TO JAVALAMBRE. A SCIENTIFIC PROJECT
The Observatorio Astrofísico de Javalambre, with its 2 very wide field telescopes has been purposely built to conduct large scale surveys. The use of medium-narrow band filters, pioneered by the ALHAMBRA project, will produce a low resolution spectrum of every pixel in the sky. The first defined projects, J-PLUS@T80 and J-PAS@T250 are driven by the study of the nearby Universe and the study of dark energy...
Prof. Mariano Moles Villamate
12/03/2015 - 13:30
AirPlay Service
The Computer Center has launched a new service called AirPlay with aim of provide the users the projection of multimedia contents via wireless (WiFi). This will allow to make presentations from laptops or mobile devices without the need of any wiring connection, contributing greater ease and mobility to the speaker. In this seminar will explain the configuration and use procedures of the AirPlay service for devices with Android, iOS, OS X,...
Francisco Manuel Bayo Muñoz
05/03/2015 - 13:30
Understanding the obscuring torus and the nuclear star formation of AGN using GTC/CanariCam observations
The fueling of black holes occurring in active galactic nuclei (AGN) is fundamental to the evolution of galaxies. AGN themselves are largely explained in the context of a unified theory, by which a geometrically and optically thick torus of gas and dust obscures the AGN central engine. The torus intercepts a substantial amount of flux from the central engine and and reradiates it in the infrared. There are still many...
Almudena Alonso-Herrero
19/02/2015 - 13:30
FORMATION AND EVOLUTION OF COSMIC DUST: THE NANOCOSMOS PROJECT
Evolved stars are the factories of cosmic dust. This dust is made of tiny grains that are injected into the interstellar medium and plays a key role in the evolution of astronomical objects from galaxies to the  embryos of planets. However, the fundamental processes involved in dust formation and evolution are still a mystery. The aim of the NANOCOSMOS project is to take advantage of the new   ...
J. Cernicharo, C. Joblin & J.A. Gago
16/02/2015 - 13:30
Activity and Evolution of Oort Cloud Comets
Comets formed early in the evolution of the solar system while material was accreting to form planets. When proto-planets became large enough, a population of comets was dynamically ejected into the Oort cloud. Comets entering the inner solar system for the first time are called dynamically new comets. These objects have not been heated by the Sun and retain some of the most primordial material available for observation in the solar system...
Dr. Dennis Bodewits
11/12/2014 - 13:30
Structural properties of isolated galaxies
Distinct components of galaxies are products of internal and environmental processes throughout their lifetimes. Disentangling these processes is an important issue for understanding how galaxies form and evolve. In this context isolated galaxies represent a fruitful population to explore as they should be mainly affected by internal processes (minimal merger/accretion/tidal effects). I will present the structural analysis of a representative...
Mirian Fernández Lorenzo
04/12/2014 - 13:30
GLORIA: Global Robotic Intelligent Array for e-science
GLORIA is an FP7 project (UE-funded in 2011-14) hosted by 14 institutions (including several Spanish OPIs and Universities) based on a collaborative web 2.0 which allows to access 14 robotic telescopes worldwide with a diameter in the range 0.25-0.60 m. The goal is to grant the GLORIA users community (from citizens to amateur astronomers) participation in Citizen Science activities. To achieve this, experiments have...
Prof. Dr. Alberto J. Castro-Tirado
04/12/2014 - 13:30
GLORIA: Global Robotic Intelligent Array for e-science
    
Dr. Alberto J. Castro-Tirado
27/11/2014 - 13:30
Energetic transients as a part of time domain astronomy in TMT era
  Study of energetic cosmic explosions as a part of time domain astronomyis one of the key areas that could be pursued with upcoming Giant segmented optical-IR telescopes with a very large photon collecting area applying cutting edge technology. Existing 8-10m class telescopes have been helpful to improve our knowledge about Core-Collapse Supernovae, Gamma-ray Bursts and nature of their progenitors and explosion...
S. B. Pandey
24/11/2014 - 13:30
First results from SDSS IV - MaNGA
Large spectroscopic surveys of nearby galaxies (like the Sloan Digital Sky Survey) have shaped our understanding of galaxy evolution. However, to gain insight into the processes shaping the various galactic sub-components, a three-dimensional view (giving access to both spatial and spectral information) is necessary. In recent years, integral field spectroscopy (IFS) surveys of the nearby Universe (Sauron, CALIFA, Sami) are filling in this...
Francesco Belfiore
20/11/2014 - 13:00
An ALMA view on the compact obscured nuclei of luminous IR galaxies
Until recently, the study of the molecular interstellar medium of galaxies has been mostly focused on a few, relatively abundant, molecular species. Recent attempts at modeling the molecular emission of active galaxies have shown that standard high-density tracers do not provide univocal results and are not able to discriminate between different relevant environments (e.g., star-formation vs AGN). Spectral lines surveys allow us to explore...
Francesco Costagliola
13/11/2014 - 13:30
Unveiling the Massive Stars in the Galactic Centre
  Because of the proximity, the Galactic Centre is an unique lab for studies of the interplay between stars, ISM and super massive black holes in galactic nuclei. The central 200 pc of the Galactic Centre includes 4x10^7 molecular clouds and has a star formation  rate of ~0.03 M/yr. Three young, massive and compact star clusters were found and includes around 100 massive stars, which shape the nearby ISM. However, the...
Dr. Hui Dong
30/10/2014 - 13:30
The non-thermal universe at the highest energies: TeV gamma-ray astronomy with the MAGIC telescope
Some os the most violent processed in the universe present a non-thermal spectrum reaching energies of several tens of TeV. Due to the low fluxes at these energies, we need a technique capable to achieve collection areas of the order of the km^2. This can be reached by the Imaging Atmospheric Cherenkov technique and MAGIC is one of the main detectors for performing ground-based observations using this technique. It consists of two 17m...
Rubén López-Coto
22/10/2014 - 14:30
High Frequency Astrometry and Pulsar Studies with the Korean VLBI Network
Maria Rioja will report on the Korean VLBI Network (KVN), the first dedicated mm-VLBI array. The 3 telescopes have an innovative multifrequency receiver that allows for simultaneous observations at 22, 43, 86 &129GHz. With care these can be phase referenced to allow astrometry at these frequencies. I will show our first results of phase referencing at 132GHz and the path to compatible global VLBI. Richard Dodson will discuss a...
María Rioja and Richard Dodson
16/10/2014 - 14:30
The Fingerprint of a Galactic Nucleus: A Multi-Wavelength, High-Angular Resolution, Near Infrared Study of the Centre of the Milky Way
The centre of the Milky Way is the only galactic nucleus and the most extreme astrophysical environment that we can examine on scales of milli-parsecs. It is therefore a crucial laboratory for studying galactic nuclei and their role in the context of galaxy evolution. Yet, suitable data that would allow us to examine the stellar component of the Galactic Centre exist for less than 1% of its projected area. This ERC-funded research programme...
Dr. Rainer Schödel
15/10/2014 - 14:30
OCTOCAM: Proposal for a multichannel imager and spectrograph with high-time-resolution capabilities for the 8.1m Gemini telescopes
OCTOCAM is a multichannel imager and spectrograph that we will be proposing in the months to come for the 8.1m Gemini telescopes, in response to a call for feasibility studies of new instruments that has been recently opened. It will use dichroics to split the incoming light to obtain simultaneous observations in 8 different bands, from the ultraviolet to the near infrared. In its imaging mode, it will have a field of view of around 3'x3...
Dr. Antonio de Ugarte Postigo
24/09/2014 - 14:30
Metamateriales Quirales, el Plan B para la Refracción Negativa
  Metamateriales, más allá de los materiales, con este término se engloba una amplia variedad de materiales artificiales cuyas propiedades van más allá de las que nos proporciona la naturaleza. Mayor resistencia, extremada ligereza, propiedades exóticas o comportamientos anómalos ante la radiación son algunas de las características que estamos buscando. En esta charla...
Dr. Gregorio José Molina Cuberos
03/07/2014 - 14:30
'What is the progenitor system of the nearby Type Ia SN 2014J?'
  Type Ia supernovae (SNe Ia) are the thermonuclear explosive end-products of white dwarfs. SNe Ia are primary cosmological distance indicators and a major contributor to the chemical evolution of galaxies, yet we do not know what makes a SN Ia.   There are two basic families of models leading to a SN Ia, the single- degenerate model (SD) and the double-degenerate model (DD). In the SD scenario, a WD...
Dr. Miguel Ängel Pérez Torres
26/06/2014 - 14:30
The brief lives of massive stars as witnessed by interferometry
Massive stars present the newest and perhaps most challenging opportunity for long baseline interferometry to excel. Large distances require high angular resolution both to study the means of accreting enough mass in a short time and to split new-born multiples into their components for the determination of their fundamental parameters. Dust obscuration of young stellar objects require interferometry in the infrared, while post-...
Dr. Christian Hummel
24/06/2014 - 14:30
Remote sensing: survival strategies in the jungle of averaging kernels and covariance matrices
Outer space, stars, exoplanets, planets in the solar system, and even the Earth's middle and upper atmosphere have in common that it is inconvenient, expensive, and often technically unfeasible to make in situ measurements there. Remote sensing, e.g., by means of radiance measurements, is a relatively cheap and convenient alternative. The conversion of the measured radiances to the quantities of interest, e.g., temperature and composition...
Dr. Thomas von Clarmann
05/06/2014 - 14:30
Status of Astronomy in East Africa
Activities of astronomy  in East Africa are driven the East African Astronomical Society (EAAS)  supported mainly by the IAU/OAD.  A positive trend in the development of astronomy  activities in the region is  characterised by the  inclusion of astronomy into the curriculum at all levels, construction of astronomy observatories and research centres (e.g. Entoto Observatory -first light last week), opening new MSc...
Dr. Pheneas Nkundabakura
29/05/2014 - 14:30
IAA Computing Service
A cluster is defined as a collection of interconnected stand-alone workstations or PCs cooperatively working together as a single, integrated computing resource. Cluster Computing has become the paradigm of choice for executing large-scale science, engineering, and commercial applications. This is due to their low cost, high performance, availability of off-the-shelf hardware components and freely accessible software tools that that can be...
Rafael Parra
15/05/2014 - 14:30
Deep spectroscopy of planetary nebulae
In nebulae astrophysics, there are two long-standing discrepancies: 1) the ionic and elemental abundances of C, N, O, and Ne derived from optical recombination lines (ORLs) are systematically higher than those derived from collisionally excited lines (CELs); 2) the electron temperature derived from H I recombination continuum (e.g., Balmer jump at 3646 A) is always lower than that derived from CELs.  These two...
Dr. Xuan Fang
24/04/2014 - 14:30
Inconsistences in the harmonic analysis of time series
  The power of asteroseismology relies on the ability to infer the stellar structure from the unambiguous frequency identification of the correspoinding pulsation mode. Hence, the use of a Fourier transform is in the basis of asteroseismic studies. Nevertheless, the difficulties with the interpretation of the frequencies found in many stars lead us to reconsider Fourier analysis and the classical methods used to process time series...
Javier Pascual Granado
10/04/2014 - 14:30
Sculpting the Galactic Centre: Astrophysics and fundamental physics with photons and gravitational waves
Since 1993 we have known that the Galactic Center (GC) displays a core-like distribution of red giant branch (RGB) stars starting at ~ 1'', which poses a theoretical problem, because the GC should have formed a segregated cusp of old stars. I postulate that the reason for the missing stars in the RGB is closely intertwined with the formation of a formerly existing dense gas disk, an episode that removed the...
Dr. Pau Amaro-Seoane
08/04/2014 - 14:30
The IAA Cloud Service
  The rise in speed of communications and the decline in prices of storage elements, has caused we can put some of our information on the net in order to make it available easily from anywhere. In this sense, it is said that your information is hosted in the cloud. Nowadays, there are several software solutions to sync and sharing files on the cloud, like Dropbox, Google Drive or Sky Drive, among others. In the IAA, a cloud...
Francisco Manuel Bayo Muñoz and Juan José Guijarro Jiménez
03/04/2014 - 14:30
A ring system detected around the Centaur (10199) Chariklo
We will report observations of a multichord stellar occultation that revealed the presence of a ring system around the centaur object (10199) Chariklo. There are two dense rings,with respective widths of about 7 and 3 kilometres, optical depths of 0.4 and 0.06, and orbital radii of 391 and 405 kilometres. We will also present more results obtained after the occultation on June 3rd 2013. Photometric and spectroscopic...
Dr. Rene Duffard
27/03/2014 - 13:30
New findings on the X-ray emission from Wolf-Rayet nebulae
We present the most recent results of XMM-Newton and Chandra observations on the only four Wolf-Rayet (WR) nebulae observed to date. Given the limited number of observations and the different morphological and spectral characteristics of these nebulae, it has been difficult to understand the physics behind the plasma emission. Numerical and analytical models can not explain the 'soft' nature and low plasma temperatures (T~106 K)...
Jesús A. Toalá
20/03/2014 - 13:29
The Nature of the IR Emission in Low-Luminosity AGN at Parsec Scales
The vast majority of AGN belong to the low-luminosity class (LLAGN): they exhibit a low radiation efficiency (L/Ledd < 10^-3) and the absence of the big blue bump in their spectra, a signature of the accretion disk. The study of LLAGN is a complex task due to the contribution of the host galaxy, whose light outshines these faint nuclei. As a consequence, numerical models are usually compared with relatively poorly defined spectral energy...
Juan Antonio Fernández Ontiveros
13/03/2014 - 13:30
Quasars and their emission lines as cosmological probes
Quasars are the most luminous stable sources in the Universe. They are currently observed out to redshift z ~ 7 when the Universe was less than one tenth of its present age. Since their discovery 50 years ago astronomers have dreamed of using them as standard candles. Unfortunately quasars cover a very large range (8 dex) of luminosity making them far from standard. I briefly review several methods that can potentially exploit quasars...
Dr. Paola Marziani
06/03/2014 - 13:30
La Asociación de Mujeres Investigadoras y Tecnólogas (AMIT)
La incorporación de la mujer a la investigación, la docencia o la gestión de la Ciencia y las Humanidades supone un progreso social. La participación de las mujeres en estas esferas, sin embargo, no es igualitaria respecto a los hombres en la España de comienzos del siglo XXI. La presencia de la mujer es dramáticamente decreciente a medida que se sube en los escalones profesionales. AMIT es una...
J. Masegosa
20/02/2014 - 13:30
The AGN nature of LINER nuclear sources
The origin of the main excitation mechanisms in LINER (Low Ionization Emission Line Region) nuclei are still controversial, with nonstellar photoionization, fast shocks or hot stars as the principal candidates. In the AGN scenario, LINERs could represent the link between more powerful AGN and normal galaxies as suggested by their low X-ray luminosities. Their interest increases as they would be the dominant population of active...
Dr. I. Márquez
13/02/2014 - 13:30
A powerful new method to measure the atmospheric water vapour column.
We have developed a reliable powerful method to measure the atmospheric column of water vapour (PWV) down to very low levels. For this purpose we use and off-the-shelf cheap spectrometer to measure the equivalent width of the H2O bands at 940nm. In order to calibrate the measurements we use the radiative transfer model included in the package SCIATRAN to produce theoretical solar spectra as observed on the ground, based on simultaneous...
Prof. E. Pérez
06/02/2014 - 13:30
The bricks of the Very Large Telescope Interferometer
In this talk we will perform a review of the basic principles of the optical/near-infrared interferometry and of the current European facilities to use this observational technique. Particularly, we will describe the interferometric observables used at near-infrared wavelengths. We will provide a review of the current (and future) instruments available at the ESO Very Large Telescope Interferometer (VLTI), their advantages and limitations as...
Lic. Joel Sánchez Bermúdez
30/01/2014 - 13:30
The CHESS survey of the protostellar shock L1157-B1
Outflows generated by protostars heavily affect the kinematics and chemistry of the hosting molecular cloud due to strong shocks. These shocks heat and compress the ambient dense gas switching on a complex chemistry that leads to an enhancement of the abundance of several species, as reported in "chemically active" outflows, whose archetype is the outflow of the low-mass Class 0 protostar L1157. I'll present the results of...
Dr. Gemma Busquet
23/01/2014 - 13:30
Nucleosynthesis and molecular processes in evolved stars
Most of the stars (M < 8 solar masses) in the Universe end their lives with a phase of strong mass loss and experience thermal pulses (TP) on the Asymptotic Giant Branch (AGB), just before they form Planetary Nebulae (PNe). They are one of the main contributors to the enrichment of the interstellar medium and thus to the chemical evolution of galaxies. More specifically, the more massive AGB stars form very different isotopes (such as...
Dr. Anibal García Hernández

Pages