On the Collapsar Model of Long Gamma-Ray Bursts:Constraints from Cosmic Metallicity Evolution
On the Collapsar Model of Long Gamma-Ray Bursts:Constraints from Cosmic Metallicity Evolution
We explore the consequences of new observational and theoretical evidence that long gamma-ray bursts (GRBs) prefer low-metallicity environments. Using recently derived mass-metallicity correlations and the mass function from SDSS studies, and adopting an average cosmic metallicity evolution from Kewley & Kobulnicky and Savaglio et al., we derive expressions for the …