An expanding vortex site for the r-process in rotating stellar collapse
An expanding vortex site for the r-process in rotating stellar collapse
复制标题
旋转恒星塌陷中 r 过程的扩展涡旋位点
DOI：
10.1086/184448
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
James R. Wilson
中科院分区：
文献类型：
--
作者：
E. Symbalisty;D. Schramm;James R. Wilson
本文利用基于Symbalisty（1984）的欧拉自适应网格MHD程序的二维膨胀涡恒星坍缩模拟，从理论上研究了r过程核合成的天体物理场。结果用图形表示，发现经典的r过程可以解释为一个15太阳质量的星星的高速旋转的铁核坍缩的结果，其中沿旋转轴的角速度沿着达到最大值1000 rad/s，对应于内部1.5太阳质量的角动量为3.4 x 10的48次方尔格/s。喷射出的喷流产生约0.0004太阳质量每超新星，足以解释所观察到的丰富的r-过程的产品。
The astrophysical site of r-process nucleosynthesis is investigated theoretically using two-dimensional expanding-vortex stellar-collapse simulations based on the Eulerian adaptive-mesh MHD code of Symbalisty (1984). The results are presented graphically, and it is found that the classical r-process can be explained as the result of the collapse of the highly rotating iron core of a 15-solar-mass star, in which the angular velocity along the rotation axis reaches a maximum of 1000 rad/s, corresponding to an angular momentum of 3.4 x 10 to the 48th erg/s for the inner 1.5 solar mass. The ejected jets are shown to yield about 0.0004 solar mass per supernova, sufficient to explain the observed abundances of r-process products.