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Nucleosynthetic Yields from "Collapsars"

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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.

Conference Name 10th Symposium on Nuclei in the Cosmos
Conference Location Mackinac Island, Michigan, USA
Start Date Jul 27, 2008
End Date Aug 1, 2008
Publication Date Nov 28, 2008
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