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Nucleosynthesis Calculations from Core-Collapse Supernovae

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Abstract

We review some of the uncertainties in calculating nucleosynthetic yields, focusing on the explosion mechanism. Current yield calculations tend to either use a piston, energy injection, or enhancement of neutrino opacities to drive an explosion. We show that the energy injection, or more accurately, an entropy injection mechanism is best-suited to mimic our current understanding of the convection-enhanced supernova engine. The enhanced neutrino-opacity technique is in qualitative disagreement with simulations of core-collapse supernovae and will likely produce errors in the yields. But piston-driven explosions are the most discrepant. Piston-driven explosion severely underestimate the amount of fallback, leading to order-of-magnitude errors in the yields of heavy elements. To obtain yields accurate to the factor of a few level, we must use entropy or energy injection and this has become the NuGrid collaboration approach.

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
Publicly Available Date Mar 28, 2024
Publisher URL http://arxiv.org/abs/0811.4648v1

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