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.

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

References in corpus (6)

• Collapsars - Gamma-Ray Bursts and Explosions in "Failed Supernovae"
• Hyper-Accreting Black Holes and Gamma-Ray Bursts
• Mass Limits For Black Hole Formation
• Explosive yields of massive stars from Z=0 to Z=Zsun
• Constraints on the Progenitor of Cassiopeia A
• SNSPH: A Parallel 3-D Smoothed Particle Radiation Hydrodynamics Code

Cited by in corpus (1)

• Difficulties in Probing Nuclear Physics: A Study of ${}^{44}$Ti and ${}^{56}$Ni