arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1801.04031astro-ph.SRastro-ph.HE
收藏

质量吸积的白矮星和Ia型超新星

Mass-accreting white dwarfs and type Ia supernovae

Bo Wang

摘要:

Ia型超新星(SNe Ia)在理解宇宙演化中起着重要作用。它们被认为是双星中质量吸积的碳氧白矮星(CO WD)的热核爆炸,尽管吸积WD的质量供体仍然没有很好地确定。在这篇文章中,我回顾了最近的研究质量吸积WD,包括H-和He吸积WD。我还回顾了目前研究最多的SNe Ia祖细胞模型,即,单简并模型(包括WD+MS通道、WD+RG通道和WD+He星通道)、双简并模型(包括剧烈合并情景)和亚克拉塞卡质量模型。讨论了Ia型超新星产生的初始参数空间、双星演化路径、Ia型超新星的候选祖先星、Ia型超新星可能存在的伴星以及观测约束条件等,并总结了Ia型超新星的其他可能的祖先星模型,包括混合CONe WD模型、核心简并模型、双WD碰撞模型、自旋上/自旋下模型和WD在黑洞附近的模型.目前看来,需要两个或两个以上的祖先模型来解释观测到的Ia超新星的多样性.

英文摘要:

Type Ia supernovae (SNe Ia) play a prominent role in understanding the evolution of Universe. They are thought to be thermonuclear explosions of mass-accreting carbon-oxygen white dwarfs (CO WDs) in binaries, although the mass donors of the accreting WDs are still not well determined. In this article, I review recent studies on mass-accreting WDs, including H- and He-accreting WDs. I also review currently most studied progenitor models of SNe Ia, i.e., the single-degenerate model (including the WD+MS channel, the WD+RG channel and the WD+He star channel), the double-degenerate model (including the violent merger scenario) and the sub-Chandrasekhar mass model. Recent progress on these progenitor models is discussed, including the initial parameter space for producing SNe Ia, the binary evolutionary paths to SNe Ia, the progenitor candidates of SNe Ia, the possible surviving companion stars of SNe Ia, and some observational constraints, etc. Some other potential progenitor models of SNe Ia are also summarized, including the hybrid CONe WD model, the core-degenerate model, the double WD collision model, the spin-up/spin-down model, and the model of WDs near black holes.To date, it seems that two or more progenitor models are needed to explain the observed diversity among SNe Ia.

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。

↑