Eventos

The understanding of the nature of AGNs and the galaxies hosting them belongs to one of the most interesting topics of modern astrophysical research.

The inner part of the rotation curve is crucial in determining the nature of the dark matter. The shape of the dark spherical halo is determined by the central density and the core radius.

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The dynamics of stellars systems is fully specified by its distribution function - the phase density of its consistuent stars - and the form of the gravitational potential that binds it together.

Se han modelado quimicamente 4 galaxias enanas esferoidales (dSph) satelites locales a partir de historias de formacion estelar obtenidas de sus diagramas HR.

Because of their low gravitational energies dwarf galaxies are greatly exposed to energetical influences from internal and external sources.

The availability of Hipparcos data has revolutionized astrometry. The impact has been felt more strongly in those fields where there is a significant number of objects within 200 pc, which corresponds to the maximum distance at which individual Hipparcos parallaxes can be considered accurate.

We present a simple phenomenological model of feedback in early-type galaxies that tracks the evolution of the gas content, metallicity and temperature.

Tidal Dwarf Galaxies (TDGs) are created during a violent interaction of galaxies containing at least one spiral. Atomic hydrogen is torn off a spiral and star formation takes place in this gas which accumulates at the ends of tidal tails.

I will summarize the results of our recently completed HST/WFPC2 I-band survey of a sample of 77 nearby, late-type spiral galaxies with low inclination. The main purpose of this catalog is to study the frequency and properties of nuclear star clusters in this class of galaxies.

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El proyecto ALMA exigirá grandes esfuerzos tanto en el dominio técnico como en el de la modelización que deberá simular o tratar ciertos efectos.

In hierarchical clustering scenarios of galaxy formation, such as cold dark matter-dominated cosmologies (White and Rees 1978), dwarf galaxies should have formed prior to the epoch of giant galaxy formation and would be the building blocks of larger galaxies.

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En esta charla voy a revisar la evolución del 4He en el Universo, con un énfasis particular en la determinación de la abundancia de Helio primordial Y_P y sus implicaciones cosmológicas. Discutiré las determinaciones más recientes de Y_P, y las incertidumbres que las afectan.

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Resultados de observaciones cometarias recientes han estimulado varias hipotesis nuevas sobre el origen de la materia volatil terrestre, incluyendo el agua, moleculas organicas y gases nobles.

Los modelos de sintesis evolutiva son una herramienta que se aplica para determinar las propiedades fisicas de un amplico rango de objetos, desde cumulos estelares a galaxias a distancias cosmologicas.

Las nebulosas planetarias son el resultado de la evolucion de estrellas de masa baja e intermedia.

The study of Mars and its planetary water inventory is particularly interesting because this planet is similar to Earth in many ways.

The direct detection of terrestrial extra-solar planned should be possible in the next 10 or 20 years. It is the main purpose of two space missions: Darwin (ESA) and TPF (NASA).

This talk deals with properties of very young (< 10-20 Myr) stellar clusters which are in the nebular phase and are embedded in photoionized regions (classical extragalactic HII regions (RHIIs) or starburst galaxies).

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In this seminar, an overview of the utility of studying non-radial non-adiabatic oscillations of stars such as $\delta$ Scuti, $\beta$ Cephei and Slowly Pulsating B stars will be given, with a particular attention on the problem of mode identification.

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The description and the first results of the new project will be presented. It is devoted to the search for the most metal-deficient blue compact galaxies.

LS-RCrA 1 es una estrella de tipo espectral muy tardío (M6.5-M7) cuyo espectro muestra líneas de emisión muy intensas, tanto prohibidas como permitidas.

According to the hierarchical scenario, galaxies form via merging and accretion of small objects. Within a series of high resolution simulations we have studied the formation and evolution of dark matter halos hosting galaxies. First halos have been formed at z > 10.