压强梯度与前身星模型Ws15M⊙超新星爆发  

Pressure Gradient and the Supernova Explosion of Presupernova Model Ws15M_⊙

作　　者：罗志全[1] 刘门全[1] 彭秋和[2] 

机构地区：[1]西华师范大学理论物理研究所,南充637002 [2]南京大学天文系,南京210093

出　　处：《天文学报》2008年第1期12-17,共6页Acta Astronomica Sinica

基　　金：国家自然科学基金(10778719);四川省教育厅重点科研项目(2006A079)资助

摘　　要：针对前身星模型Ws15M_⊙,采用程序WlYW89数值模拟了超新星瞬时爆发过程;数值结果表明,在不增大压强的前提下,适当调节坍缩和反弹阶段的压强梯度,超新星瞬时爆发是可以获得成功的.在有限的引力释放能量的情况下,压强梯度的调整增加了对流传能机制,可以缩短瞬时爆发所用的时间,提高爆发能量,使得瞬时强爆炸能够成功.Numerical simulation on the supernova explosion of the presupernova model Ws15M⊙ has been performed using the program WLYW89. It is shown that the supernova prompt explosion may be success by properly adjusting the pressure gradient at the stage of the collapse and the rebound respectively, simultaneously, and not increasing the pressure in the iron core. In the case of insufficient releasing energy by gravity, the adjustment of the pressure gradient has strengthened the mechanism of the transferring energy by convection. This may shorten the time and increase the explosion energy of the supernova explosion. It makes the supernova prompt explosion reality.

关 键 词：超新星 普通 方法 数值 

分 类 号：P157[天文地球—天文学]