Breakout of the supernova shock

被引:6
作者
Bethe, HA
机构
[1] Floyd R. Newman Laboratory of Nuclear Studies, Cornell University, Ithaca
关键词
nuclear reactions; nucleosynthesis; abundances; shock waves; supernovae; general;
D O I
10.1086/177822
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The shock in a supernova of Type II first moves slowly and then suddenly breaks out with a velocity of order 10(9) cm s(-1). This breakout is due to the recombination of nucleons into alpha-particles. It is shown that this recombination provides enough energy to lift the matter against gravity. The net energy after escape from the star is about 4 x 10(18) ergs g(-1). Supernovae of Type II differ mainly in the binding energy of the mantle of the progenitor.
引用
收藏
页码:737 / 739
页数:3
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