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Statistical study of the ISM of GRB hosts

Published online by Cambridge University Press:  05 March 2015

A. de Ugarte Postigo ,
J. P. U. Fynbo ,
C. C. Thöne ,
L. Christensen ,
J. Gorosabel  and
R. Sánchez-Ramírez
A. de Ugarte Postigo
Affiliation:
IAA-CSIC, Glorieta de la Astronomía s/n, E-18008, Granada, Spain Dark Cosmology Centre, NBI, Juliane Maries Vej 30, Copenhagen Ø, D-2100, Denmark
J. P. U. Fynbo
Affiliation:
Dark Cosmology Centre, NBI, Juliane Maries Vej 30, Copenhagen Ø, D-2100, Denmark
C. C. Thöne
Affiliation:
IAA-CSIC, Glorieta de la Astronomía s/n, E-18008, Granada, Spain
L. Christensen
Affiliation:
Dark Cosmology Centre, NBI, Juliane Maries Vej 30, Copenhagen Ø, D-2100, Denmark
J. Gorosabel
Affiliation:
IAA-CSIC, Glorieta de la Astronomía s/n, E-18008, Granada, Spain
R. Sánchez-Ramírez
Affiliation:
IAA-CSIC, Glorieta de la Astronomía s/n, E-18008, Granada, Spain
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Abstract

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Gamma-ray burst (GRB) afterglows shine, during a brief period of time as the most luminous objects that can be detected in the Universe. They have been observed at almost any redshift, from our nearby environment (the nearest one, at z = 0.08) to the very distant Universe (the current record holder at z = 9.4). Their optical spectra are well reproduced by a clean, simple power law, making them ideal light houses to probe the interstellar medium of their host galaxies at any redshift. We have used the largest sample of GRB afterglow spectra collected to date to perform a statistical study of the interstellar medium in their host galaxies. By analysing the distribution of equivalent widths of the most prominent absorption features we evaluate the different types of environments that host GRBs and study their diversity.

Keywords

gamma rays: burstsgalaxies: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Highlights H16: Highlights of Astronomy , August 2012 , pp. 620
Copyright
Copyright © International Astronomical Union 2015 

References

de Ugarte Postigo, A., Fynbo, J. P. U., Thöne, C. C., et al. 2012, A&A 548, A11Google Scholar
Christensen, L., Fynbo, J. P. U., Prochaska, J. X., et al. 2011, ApJ 727, 73CrossRefGoogle Scholar
Fynbo, J. P. U., Jakobsson, P., Prochaska, J. X., et al. 2009, ApJS 185, 526CrossRefGoogle Scholar