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arXiv 0906.4148astro-ph.SR
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演化为短延迟时间的Ia型超新星

Evolving to Type Ia Supernovae with Short Delay Times

Bo Wang, Xuefei Chen, Xiangcun Meng, Zhanwen Han

摘要:

单简并模型是目前Ia型超新星(SNe Ia)较好的前身模型。最近的调查WD + He星通道的单简并模型意味着,这个通道是值得注意的生产超新星Ia。在本文中,我们研究了超新星Ia出生率和延迟时间的通道,通过一个详细的二进制人口合成方法。我们发现,根据我们的标准模型,来自WD + He恒星通道的银河系SN Ia出生率为$\sim 0.3\times 10^{-3} {\rm yr}^{-1}$,并且该通道可以以较短的延迟时间($\sim4.5\times10^7 - 1.4\times10^8$ yr)解释SN Ia。同时,这些WD + He星系统可能与超新星爆发前的年轻超软X射线源有关。

英文摘要:

The single-degenerate model is currently a favourable progenitor model for Type Ia supernovae (SNe Ia). Recent investigations on the WD + He star channel of the single-degenerate model imply that this channel is noteworthy for producing SNe Ia. In this paper we studied SN Ia birthrates and delay times of this channel via a detailed binary population synthesis approach. We found that the Galactic SN Ia birthrate from the WD + He star channel is $\sim 0.3\times 10^{-3} {\rm yr}^{-1}$ according to our standard model, and that this channel can explain SNe Ia with short delay times ($\sim4.5\times10^7 - 1.4\times10^8$ yr). Meanwhile, these WD + He star systems may be related to the young supersoft X-ray sources prior to SN Ia explosions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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