Explosive nucleosynthesis in SN 1987A. II - Composition, radioactivities, and the neutron star mass
Explosive nucleosynthesis in SN 1987A. II - Composition, radioactivities, and the neutron star mass
复制标题
SN 1987A 中的爆炸性核合成。
DOI：
--
复制
发表时间：
1990
期刊：
影响因子：
--
通讯作者：
K. Nomoto
中科院分区：
文献类型：
--
作者：
Friedrich;M. Hashimoto;K. Nomoto
野本和桥本（1988）的20太阳质量模型被用于6太阳质量。核芯是用来进行爆炸核合成计算的。爆炸能量为10的51次方尔格，在热光度曲线的不确定范围内。详细讨论了核合成过程及其燃烧产物。结果与SN 1987A红外观测的丰度以及银河系化学演化中II型超新星的平均核合成进行了比较。预测了长寿命放射性核的丰度及其对后期光曲线和伽马射线观测的重要性。中子星与抛射物之间的质量缺口的位置由抛射的Ni-56总量推断出来。这需要一颗重子质量为1.6±0.045太阳质量的中子星，减去非旋转中子星的结合能后，对应的引力质量为1.43±0.05太阳质量。参135。
The 20 solar mass model of Nomoto and Hashimoto (1988) is utilized with a 6 solar mass. He core is used to perform explosive nucleosynthesis calculations. The employed explosion energy of 10 to the 51st ergs lies within the uncertainty range inferred from the bolometric light curve. The nucleosynthesis processes and their burning products are discussed in detail. The results are compared with abundances from IR observations of SN 1987A and the average nucleosynthesis expected for Type II supernovae in Galactic chemical evolution. The abundances of long-lived radioactive nuclei and their importance for the late light curve and gamma-ray observations are predicted. The position of the mass cut between the neutron star and the ejecta is deduced from the total amount of ejected Ni-56. This requires a neutron star with a baryonic mass of 1.6 + or - 0.045 solar mass, which corresponds to a gravitational mass of 1.43 + or - 0.05 solar mass after subtracting the binding energy of a nonrotating neutron star. 135 refs.