利用^(64)Zn产量计算O-Ne-Mg超新星比例

A Method to Estimate the Ratio of O-Ne-Mg Supernova by Using the Yield of ^(64)Zn

O-Ne-Mg超新星由于其特殊的星核结构和核合成产物分布使它在超新星研究中具有非常重要的意义。文章不是利用恒星初始质量分布函数方法来计算O-Ne-Mg超新星在核塌缩型超新星中的比例,而是根据O-Ne-Mg超新星核合成的64Zn产量来估计它的爆发比例,不仅考虑了星系中快中子俘获和慢中子俘获过程对64Zn的来源的影响,而且考虑了Ia型超新星对16O产量的贡献。计算结果表明这种方法更合理和有效。

O-Ne-Mg supernova plays a very important role due to its special structure and nucleosynthesis product distribution. Usually,the stellar initial mass distribution function is adopted to calculate the ratio of O-Ne-Mg supernovae to the core collapse supernova. In this paper,however, one of the O-Ne-Mg supernova nueleosynthesis product,^64Zn is used to estimate the ratio;moreover, not only rapid and slow neutron capture process but also the contribution from type Ia supernovae are taken into account in our method.The results show that our method is more reasonable and effective than the previous methods.