TY - JOUR
T1 - No correlation between host galaxy metallicity and gamma-ray energy release for long-duration gamma-ray bursts
AU - Levesque, Emily M.
AU - Soderberg, Alicia M.
AU - Kewley, Lisa J.
AU - Berger, Edo
PY - 2010/12/10
Y1 - 2010/12/10
N2 - 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.
AB - 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.
KW - Gamma-Ray burst:general
UR - http://www.scopus.com/inward/record.url?scp=78650029973&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/725/1/1337
DO - 10.1088/0004-637X/725/1/1337
M3 - Article
SN - 0004-637X
VL - 725
SP - 1337
EP - 1341
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 1
ER -