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The metallicity and dust content of a redshift 5 gamma-ray burst host galaxy
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(2014) The metallicity and dust content of a redshift 5 gamma-ray burst host galaxy. The Astrophysical Journal, Volume 785 (Number 2). Article number 150. doi:10.1088/0004-637X/785/2/150 ISSN 0004-637X.
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Official URL: http://dx.doi.org/10.1088/0004-637X/785/2/150
Abstract
Observations of the afterglows of long gamma-ray bursts (GRBs) allow the study of star-forming galaxies across most of cosmic history. Here we present observations of GRB 111008A, from which we can measure metallicity, chemical abundance patterns, dust-to-metals ratio (DTM), and extinction of the GRB host galaxy at z = 5.0. The host absorption system is a damped Lyα absorber with a very large neutral hydrogen column density of log N(H i)/cm−2 = 22.30 ± 0.06 and a metallicity of [S/H] = −1.70 ± 0.10. It is the highest-redshift GRB with such a precise metallicity measurement. The presence of fine-structure lines confirms the z = 5.0 system as the GRB host galaxy and makes this the highest redshift where Fe ii fine-structure lines have been detected. The afterglow is mildly reddened with AV = 0.11 ± 0.04 mag, and the host galaxy has a DTM that is consistent with being equal to or lower than typical values in the Local Group.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
Journal or Publication Title: | The Astrophysical Journal | ||||||||
Publisher: | Institute of Physics Publishing, Inc. | ||||||||
ISSN: | 0004-637X | ||||||||
Official Date: | 4 April 2014 | ||||||||
Dates: |
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Volume: | Volume 785 | ||||||||
Number: | Number 2 | ||||||||
Article Number: | Article number 150 | ||||||||
DOI: | 10.1088/0004-637X/785/2/150 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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