No Correlation Between Host Galaxy Metallicity and Gamma-Ray Energy Release for Long-Duration Gamma-Ray Bursts

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No Correlation Between Host Galaxy Metallicity and Gamma-Ray Energy Release for Long-Duration Gamma-Ray Bursts

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Title: No Correlation Between Host Galaxy Metallicity and Gamma-Ray Energy Release for Long-Duration Gamma-Ray Bursts
Author: Levesque, Emily M.; Soderberg, Alicia M.; Kewley, Lisa J.; Berger, Edo

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Citation: Levesque, Emily M., Alicia M. Soderberg, Lisa J. Kewley, and Edo Berger. 2010. No Correlation Between Host Galaxy Metallicity and Gamma-Ray Energy Release for Long-Duration Gamma-Ray Bursts. The Astrophysical Journal 725, no. 1: 1337–1341. doi:10.1088/0004-637x/725/1/1337.
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Abstract: We compare the redshifts, host galaxy metallicities, and isotropic (Eγ,iso) and beaming-corrected (Eγ) gamma-ray energy release of 16 long-duration gammaray bursts (LGRBs) at z < 1. From this comparison, we find no statistically significant correlation between host metallicity and redshift, Eγ,iso, 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.
Published Version: doi:10.1088/0004-637x/725/1/1337
Other Sources: https://arxiv.org/pdf/1007.0439.pdf
Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:30410829
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