ID 218

ID 218
Tipo de Comunicación: Oral
Sesión Científica: Galaxias y cosmologia
Titulo: X-shooter spectroscopy of GRB afterglows
Nombre (Autor que presenta): Antonio
Apellidos (Autor que presenta): de Ugarte Postigo
Apellidos y nombre de los autores:
Resumen:
Since its commissioning at ESO\'s Very Large Telescope in 2009 X-shooter has
obtained spectroscopy of over 80 gamma-ray burst afterglows with redshifts ranging
from 0.05 to 6.3. Thanks to its efficiency, broad wavelength coverage, and spectral
resolution it has become the most efficient tool for gamma-ray burst afterglow
spectroscopy. In this talk I will present the sample and some results of the analysis of
absorption systems. The different features are compared with the characteristics of the
explosion (duration, spectral shape, energetics, etc.) and with the properties of the host
galaxy (mass, age, etc.) to improve our understanding of the nature of the explosions
and how they interact with their environments. Using the large redshift range of the
spectra collection we perform studies of the evolution of GRB environments across the
history of the Universe and their relation with the evolution of star formation.