Eventos

Magnetic reconnection is a fundamental plasma process that permits the exchange of energy and mass between colliding plasmas, e.g., between the Solar Wind and the Earth's magnetosphere.

Superthin galaxies are bulgeless, late-type spiral galaxies seen edge-on.  HI synthesis observations probe the kinematic structure of their interstellar medium.  Observations of these isolated, quiescent galaxies have reached column densities as low as few x 1018 atoms .

Primitive extraterrestrial materials, such as meteorites and dust collected by sample return missions, are characterized by a large compositional heterogeneity at different scales. This heterogeneity has been observed in the laboratory by different techniques.

The abundance of Lithium observed in very young stellar populations is ~ 4 times larger than the primordial one estimated by recent Planck measurements.

Planetary nebulae are one of the last stages of evolution of stars like our Sun. The beginning of photoionization, giving rise to a new planetary nebula, will certainly produce dramatic changes in the object, but this instant is difficult to observe, since it will only take a few decades.

Es conocido que el Sol presenta un ciclo de once años, a lo largo del cual su actividad magnética (que se manifiesta en forma de manchas, explosiones que liberan energía y eyecciones de materia al espacio interplanetario) oscila desde un mínimo hasta un máximo.

Nuclear activity as is observed in active galactic nuclei (AGN) might be a phase occurring in all galaxies, and this activity could be recurrent. A perfect laboratory to test these scenarios are the giant radio galaxies, since their emission can be as old as 10⁷-10⁸ years.

The main goal of this talk is to promote Big Data at the IAA.

A brief description of the Big Data problem is presented and how to solve it, minimizing the technical details, reviewing previous work at IAA and showing a practical case demonstration.

Active  galactic  nuclei  (AGN)  show  a  great  diversity  of  optical  and  UV  emission  line properties. Dynamical  and  physical  models should  be built  accordingly.

Only around 60 AGNs have been detected so far at Very High Energy (VHE, E>100 GeV) gamma rays, most of them being blazars (AGNs which relativistic jet point in the direction to the Earth).

The environment of Sgr A* provides a window to the close-up study of star formation under extreme physical conditions.

In the last decade, large surveys drawn a detailed picture of fundamental properties of galaxies increasing our understanding of the formation and evolution of galaxies.

Space VLBI observations with RadioAstron provide an extraordinary improvement of angular resolution. In this talk, I will present the results obtained from RadioAstron imaging of the relativistic jet in the quasar 0836+710 at L, C, and K bands.

I shall comment on the difficulties faced today by the so called "Unified Model" (UM) for AGN. According to this model,  type1 and type 2 AGN are the same except for a combined effect of orientation and obscuration in the line of sight.

The first phases of galaxy formation and evolution remain poorly understood and improved observational constraints are needed to test the theoretical picture and simulations.

HETH is one of the youngest groups at IAA, founded in 2012, and belongs to both the extragalactic and stellar department. Thanks to recent success in funding applications, both by the group and by external researchers, HETH has now grown to a group of 7 young researchers.

This august, we have published clear evidence of a planet orbiting the nearest star to Earth, Proxima Centauri, at a distance of 1.295 parsecs (4.2 ly) and one of the best-studied low-mass star.

CALIFA (Calar Alto Legacy Integral Field Area survey) has provided spatially resolved optical spectra of thousands of HII regions in spiral galaxies of the Local Universe whose properties can be linked with the integrated properties of the host galaxies.

In this talk I present an analysis of the gas-phase oxygen abundances of a sample of 28 galaxies in the local Universe (z<0.02) hosting Type Ia Supernovae (SNe Ia). The data were obtained with the 4.2m William Herschel Telescope (WHT).

The RadioAstron Space VLBI mission utilizes the 10-m radio telescope on-board the dedicated Spektr-R spacecraft to observe cosmic radio sources with an unprecedented angular resolution at 92, 18, 6 and 1.3 cm. The longest baseline of the space-ground interferometer is about 350,000 km.

Blazars are the most luminous persistent objects in the sky. They emit light across the entire electromagnetic spectrum, from low-energy radio waves to high-energy gamma-rays, and they exhibit variability on timescales that range from years down to minutes.