期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 712, 期 1, 页码 L26-L30出版社
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/712/1/L26
关键词
gamma-ray burst: individual (GRB 020819)
资金
- NSF [AST07-48559]
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [0748559] Funding Source: National Science Foundation
We present spectroscopic observations of the host galaxy and explosion site of long-duration gamma-ray burst GRB 020819. We determine a metallicity for this host environment of log(O/H) + 12 = 9.0 +/- 0.1, by far the highest metallicity determined for a long-duration gamma-ray burst (LGRB) to date. We compare the metallicity and other properties of the GRB 020819 host environment to existing observations of LGRB host galaxies and consider the implications that this metallicity has for our understanding of LGRB progenitor scenarios. We also consider how this unusually high metallicity may relate to the status of GRB 020819 as a dark burst, with no detected optical afterglow.
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