电荷屏蔽对Ⅱ型超新星瞬时爆发能量的影响  

Effect of electron screening on the prompt explosion energy for type Ⅱ supernova

作　　者：刘门全[1] 张洁[1] 罗志全[1] 

机构地区：[1]西华师范大学理论物理研究所,四川南充637002

出　　处：《物理学报》2006年第6期3197-3201,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10347008)资助的课题~~

摘　　要：讨论了电荷屏蔽效应对WS15M⊙前身星模型瞬时爆发能量的影响,对电子俘获率的计算基于平均重核模型,数值模拟表明电荷屏蔽降低了电子俘获率,延长了爆发时间,使中微子泄漏的总能量增加,从而导致激波的能量略微降低.给出的方法可以适用于其他考虑电荷屏蔽效应的超新星数值模拟.The effect of electron screening on prompt explosion energy of supernova is discussed in regard to progenitor model WS15M⊙. The average heavy nuclei model is used for calculating the electron capture rates. The simulation results show that electron capture rate is decreased and the collapsing time-scale is prolonged by the electron screening, and the total energy of neutrino leakage increases. Acordingly, by the energy of the shock wave also decreases appreciably. The effect of electron screening on other supernova simulations is estimated.

关 键 词：超新星 瞬时爆发 数值模拟 电荷屏蔽 

分 类 号：P142.6[天文地球—天体物理]