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Dust and metal column densities in GRB host galaxies

Published online by Cambridge University Press:  05 September 2012

P. Schady ,
T. Dwelly ,
M. J. Page ,
J. Greiner ,
T. Krühler ,
S. Savaglio ,
S. Oates  and
A. Rau
P. Schady
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbackstraße 1, 85748 Garching, Germany email: pschady@mpe.mpg.de
T. Dwelly
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbackstraße 1, 85748 Garching, Germany
M. J. Page
Affiliation:
The UCL Mullard Space Science Laboratory, Holmbury St Mary, Surrey, RH5 6NT, UK
J. Greiner
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbackstraße 1, 85748 Garching, Germany
T. Krühler
Affiliation:
Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark
S. Savaglio
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbackstraße 1, 85748 Garching, Germany
S. Oates
Affiliation:
The UCL Mullard Space Science Laboratory, Holmbury St Mary, Surrey, RH5 6NT, UK
A. Rau
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbackstraße 1, 85748 Garching, Germany
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Abstract

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The immensely bright and intrinsically simple afterglow spectra of gamma-ray bursts (GRBs) have proven to be highly effective probes of the interstellar dust and gas in distant, star-forming galaxies. Despite significant progress, many aspects of the host galaxy attenuating material are still poorly understood. There is considerable discrepancy between the amount of X-ray and optical afterglow absorption, with the former typically an order of magnitude higher than what would be expected from the optical line absorption of neutral element species. Similar inconsistencies exist between the abundance of interstellar dust derived from spectroscopic and photometric data, and the relation between the line-of-sight and integrated host galaxy interstellar medium (ISM) remains unclear. In these proceedings we present our analysis on both spectroscopic and photometric multi-wavelength GRB afterglow data, and summarise some of the more recent results on the attenuation properties of the ISM within GRB host galaxies.

Keywords

gamma rays: burstsgalaxies: ISMISM: dustextinctionISM: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S279: Death of Massive Stars: Supernovae and Gamma-Ray Bursts , April 2011 , pp. 199 - 206
Copyright
Copyright © International Astronomical Union 2012

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