The metallicity and dust content of a redshift 5 gamma-ray burst host galaxy
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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The metallicity and dust content of a redshift 5 gamma-ray burst host galaxy. / Sparre, M.; Hartoog, O. E.; Krühler, T.; Fynbo, Johan Peter Uldall; Watson, D. J.; Wiersema, K.; D'Elia, V.; Zafar, T.; Afonso, P. M. J.; Covino, S.; Postigo, A. de Ugarte; Flores, H.; Goldoni, P.; Greiner, J.; Hjorth, J.; Jakobsson, P.; Kaper, L.; Klose, S.; Levan, A. J.; Malesani, D.; Milvang-Jensen, B.; Nardini, M.; Piranomonte, S.; Sollerman, J.; Sánchez-Ramírez, R.; Schulze, S.; Tanvir, N. R.; Vergani, S. D.; Wijers, R. A. M. J.
I: Astrophysical Journal, Bind 785, Nr. 2, 20.04.2014, s. 150-161.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - The metallicity and dust content of a redshift 5 gamma-ray burst host galaxy
AU - Sparre, M.
AU - Hartoog, O. E.
AU - Krühler, T.
AU - Fynbo, Johan Peter Uldall
AU - Watson, D. J.
AU - Wiersema, K.
AU - D'Elia, V.
AU - Zafar, T.
AU - Afonso, P. M. J.
AU - Covino, S.
AU - Postigo, A. de Ugarte
AU - Flores, H.
AU - Goldoni, P.
AU - Greiner, J.
AU - Hjorth, J.
AU - Jakobsson, P.
AU - Kaper, L.
AU - Klose, S.
AU - Levan, A. J.
AU - Malesani, D.
AU - Milvang-Jensen, B.
AU - Nardini, M.
AU - Piranomonte, S.
AU - Sollerman, J.
AU - Sánchez-Ramírez, R.
AU - Schulze, S.
AU - Tanvir, N. R.
AU - Vergani, S. D.
AU - Wijers, R. A. M. J.
PY - 2014/4/20
Y1 - 2014/4/20
N2 - 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 and extinction of the GRB host galaxy at z=5.0. The host absorption system is a damped Lyman-alpha absorber (DLA) with a very large neutral hydrogen column density of log N(HI)/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 A_V = 0.11 +/- 0.04 mag, and the host galaxy has a dust-to-metals ratio which is consistent with being equal to or lower than typical values in the Local Group.
AB - 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 and extinction of the GRB host galaxy at z=5.0. The host absorption system is a damped Lyman-alpha absorber (DLA) with a very large neutral hydrogen column density of log N(HI)/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 A_V = 0.11 +/- 0.04 mag, and the host galaxy has a dust-to-metals ratio which is consistent with being equal to or lower than typical values in the Local Group.
KW - astro-ph.CO
U2 - 10.1088/0004-637X/785/2/150
DO - 10.1088/0004-637X/785/2/150
M3 - Journal article
VL - 785
SP - 150
EP - 161
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2
ER -
ID: 128853056