Nucleosynthetic Yields from "Collapsars"
Abstract
The "collapsar" engine for gamma-ray bursts invokes as its energy source the failure of a normal supernova and the formation of a black hole. Here we present the results of the first three-dimensional simulation of the collapse of a massive star down to a black hole, including the subsequent accretion and explosion. The explosion differs significantly from the axisymmetric scenario obtained in two-dimensional simulations; this has important consequences for the nucleosynthetic yields. We compare the nucleosynthetic yields to those of hypernovae. Calculating yields from three-dimensional explosions requires new strategies in post-process nucleosynthesis; we discuss NuGrid's plan for three-dimensional yields.
Cite
@article{arxiv.0811.4650,
title = {Nucleosynthetic Yields from "Collapsars"},
author = {Gabriel Rockefeller and Christopher L. Fryer and Patrick Young and Michael Bennett and Steven Diehl and Falk Herwig and Raphael Hirschi and Aimee Hungerford and Marco Pignatari and Georgios Magkotsios and Francis X. Timmes},
journal= {arXiv preprint arXiv:0811.4650},
year = {2008}
}
Comments
To appear in the Conference Proceedings for the "10th Symposium on Nuclei in the Cosmos (NIC X)", July 27 - August 1 2008, Mackinack Island, Michigan, USA