Effect of Electron Screening on the Collapsing Process of Core-Collapse Supernovae - Astrophysics > High Energy Astrophysical Phenomena

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Abstract: By using an average heavy nuclei model, the effects of the electron screeningon electron capture EC in core-collapse supernovae are investigated. Aone-dimension code based on the Ws15\$M {\sun}\$ progenitor model is utilized totest the effects of electron screening during the collapsing process. Theresults show that, at high densities, the effects of EC on electron capturebecomes significant. During the collapsing stage, the EC rate is decreased, thecollapse timescale is prolonged and the leakage of the neutrino energy isincreased. These effects lead to an appreciable decrease in the initial energyof the bounce shock wave. The effects of electron screeening in the otherprogenitor models are also discussed.

Autor: Men-Quan Liu USTC, CWNU, Ye-Fei Yuan USTC, Jie Zhang CWNU, CQU

Fuente: https://arxiv.org/