arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1504.02635astro-ph.SRastro-ph.COastro-ph.HE
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对核心坍缩超新星祖先的观测约束:丢失大质量恒星的情况

Observational constraints on the progenitors of core-collapse supernovae : the case for missing high mass stars

S. J. Smartt

摘要:

在过去的15年里,超新星社区一直在努力确定其星系的高分辨率档案图像的核心坍缩超新星的祖星。这篇评论汇编的结果(从1999年至2013年)在一个距离有限的样本,并讨论了影响。绝大多数探测到的祖星都是II-P、II-L或IIb型的,只有一个Ib型的祖星系统被探测到,而Ibc超新星的祖星则有更多的上限(14)。这45颗超新星祖先的数据表明,在LogL~= 5.1dex的表观极限以上的高光度恒星明显不足。对于一个典型的萨尔彼得IMF,人们会期望找到13个高亮度和高质量的祖先。在这个时间和体积有限的样品中,可能只有一个物体是明确的高质量(SN 2009ip的祖先)。综述了星周尘埃和样品选择方法对测量结果的影响。这似乎不太可能解释失踪的高质量祖星。本文的结论是,在本宇宙中观测到的超新星总体上不是由大质量(M>~18Msun)恒星产生的。模型星的理论爆炸也预言了黑洞的形成和超新星的失败倾向于发生在M>~18 Msun以上。模型还表明,在8 - 120 Msun范围内的恒星存在爆炸性岛屿。观测上的限制与M>~18 Msun以上的大部分恒星坍缩形成黑洞而没有可见的超新星是相当一致的。(节录)。

英文摘要:

Over the last 15 years, the supernova community has endeavoured to identify progenitor stars of core-collapse supernovae in high resolution archival images of their galaxies.This review compiles results (from 1999 - 2013) in a distance limited sample and discusses the implications. The vast majority of the detections of progenitor stars are of type II-P, II-L or IIb with one type Ib progenitor system detected and many more upper limits for progenitors of Ibc supernovae (14). The data for these 45 supernovae progenitors illustrate a remarkable deficit of high luminosity stars above an apparent limit of Log L ~= 5.1 dex. For a typical Salpeter IMF, one would expect to have found 13 high luminosity and high mass progenitors. There is, possibly, only one object in this time and volume limited sample that is unambiguously high mass (the progenitor of SN2009ip). The possible biases due to the influence of circumstellar dust and sample selection methods are reviewed. It does not appear likely that these can explain the missing high mass progenitor stars. This review concludes that the observed populations of supernovae in the local Universe are not, on the whole, produced by high mass (M > ~18Msun) stars. Theoretical explosions of model stars also predict that black hole formation and failed supernovae tend to occur above M > ~18Msun. The models also suggest there are islands of explodability for stars in the 8-120Msun range. The observational constraints are quite consistent with the bulk of stars above M > ~18Msun collapsing to form black holes with no visible supernovae. (Abridged).

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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