Effect of Electron Screening on the Collapsing Process of Core-Collapse Supernovae

Details Effect of Electron Screening on the Collapsing Process of Core-Collapse Supernovae Effect of Electron Screening on the Collapsing Process of Core-Collapse Supernovae

2009-09-04

arxiv.org/abs/0909.0819v1

MNRSAS 400:815-819(2009)

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

5 pages, 4 figures, MNRAS in press

Scientific paper

10.1111/j.1365-2966.2009.15487.x

By using an average heavy nuclei model, the effects of the electron screening on electron capture (EC) in core-collapse supernovae are investigated. A one-dimension code based on the Ws15$M_{\sun}$ progenitor model is utilized to test the effects of electron screening during the collapsing process. The results show that, at high densities, the effects of EC on electron capture becomes significant. During the collapsing stage, the EC rate is decreased, the collapse timescale is prolonged and the leakage of the neutrino energy is increased. These effects lead to an appreciable decrease in the initial energy of the bounce shock wave. The effects of electron screeening in the other progenitor models are also discussed.

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