No correlation between host galaxy metallicity and gamma-ray energy release for long-duration gamma-ray bursts

Emily M. Levesque, Alicia M. Soderberg, Lisa J. Kewley, Edo Berger

Research output: Contribution to journalArticlepeer-review

45 Citations (Scopus)

Abstract

We compare the redshifts, host galaxy metallicities, and isotropic (Eaγiso) and beaming-corrected (Eaγ ) gammaray energy release of 16 long-duration gamma-ray bursts (LGRBs) at z < 1. From this comparison, we find no statistically significant correlation between host metallicity and redshift, Eaγiso, or Eγ . These results are at odds with previous theoretical and observational predictions of an inverse correlation between gamma-ray energy release and host metallicity, as well as the standard predictions of metallicity-driven wind effects in stellar evolutionary models.We consider the implications that these results have for LGRB progenitor scenarios, and discuss our current understanding of the role that metallicity plays in the production of LGRBs.

Original languageEnglish
Pages (from-to)1337-1341
Number of pages5
JournalAstrophysical Journal
Volume725
Issue number1
DOIs
Publication statusPublished - 10 Dec 2010
Externally publishedYes

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