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| Auteurs | M. Sparre, O.E. Hartoog, T. Krühler, J.P.U. Fynbo, D.J. Watson, K. Wiersema, V. D'Elia, T. Zafar, P.M.J. Afonso, S. Covino, A. de Ugarte Postigo, H. Flores, P. Goldoni, J. Greiner, J. Hjorth, P. Jakobsson, L. Kaper, S. Klose, A.J. Levan, D. Malesani, B. Milvang-Jensen, M. Nardini, S. Piranomonte, J. Sollerman, R. Sánchez-Ramírez, S. Schulze, N.R. Tanvir, S.D. Vergani, R.A.M.J. Wijers | | Titel | The Metallicity and Dust Content of a Redshift 5 Gamma-Ray Burst Host Galaxy |
| Tijdschrift | The astrophysical journal |
| Jaargang | 785 |
| Jaar | 2014 |
| Nummer | 2 |
| Pagina's | 150- |
| ISSN | 0004367x |
| Faculteit | Faculteit der Natuurwetenschappen, Wiskunde en Informatica |
| Instituut/afd. | FNWI: Astronomical Institute Anton Pannekoek (IAP) |
| Samenvatting | 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 $\log N(H1}/cm}^{-2}=22.30\pm 0.06$ 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. |
| Taal | Engels |
| URL | go to publisher's site |
| Soort document | artikel |
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