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arXiv · 1203.0296

The survival of nuclei in jets associated with core-collapse supernovae

Shunsaku Horiuchi·Kohta Murase·Kunihito Ioka·Peter Meszaros
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Abstract

Heavy nuclei such as nickel-56 are synthesized in a wide range of core-collapse supernovae (CCSN), including energetic supernovae associated with gamma-ray bursts (GRBs). Recent studies suggest that jet-like outflows are a common feature of CCSN. These outflows may entrain synthesized nuclei at launch or during propagation, and provide interesting multi-messenger signals including heavy ultra-high energy cosmic rays. Here, we investigate the destruction processes of nuclei during crossing from the stellar material into the jet material via a cocoon, and during propagation after being successfully loaded into the jet. We find that nuclei can survive for a range of jet parameters because collisional cooling is faster than spallation. While canonical high-luminosity GRB jets may contain nuclei, magnetic dominated models or low-luminosity jets with small bulk Lorentz factors are more favorable for having a more significant heavy nuclei component.

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Shunsaku Horiuchi, Kohta Murase, Kunihito Ioka, Peter Meszaros. 2012-03-01. The survival of nuclei in jets associated with core-collapse supernovae. https://doi.org/10.1088/0004-637x/753/1/69

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