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arXiv 1601.00871astro-ph.HE
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来自Chandra X射线观测的核心坍缩超新星的祖先约束

Progenitor constraints for core-collapse supernovae from Chandra X-ray observations

T. Heikkilä, S. Tsygankov, S. Mattila, J. J. Eldridge, M. Fraser, J. Poutanen

摘要:

Ib型、Ic型和IIb型贫氢核心坍缩超新星(SNe)的前身被认为是通过极强的恒星风(经典沃尔夫-拉叶星的特征)或通过与近伴星的双星相互作用而脱落了它们的外层氢包层。祖细胞的确切性质和这些过程的相对重要性仍然是悬而未决的问题。一个相对未探索的方法来限制的祖先是寻找高质量的X射线双星(HMXB)在SN位置在爆炸前的X射线观测。在HMXB中,一颗恒星已经爆炸成为核心坍缩SN,产生中子星或恒星质量的黑洞。系统中的第二颗恒星很可能也会以超新星的形式爆炸,这将导致系统的X射线亮度发生可检测的长期变化。特别是,爆炸前探测到HMXB与SN同时发生,可以提供有关原始物质性质的信息。本文分析了钱德拉X射线天文台公共档案中18颗邻近Ib、Ic和IIb型超新星爆炸前的ACIS观测。在样本中发现了两个可能与超新星有关的来源。此外,我们对46 SNe进行了类似的爆炸后测量。虽然我们的模型表明,祖系统与紧凑的二进制同伴可能是相当罕见的,这种类型的研究可以在未来提供更严格的限制,发现附近的SNe和合适的爆炸前X射线数据的数量都在增加。

英文摘要:

The progenitors of hydrogen-poor core-collapse supernovae (SNe) of types Ib, Ic and IIb are believed to have shed their outer hydrogen envelopes either by extremely strong stellar winds, characteristic of classical Wolf-Rayet stars, or by binary interaction with a close companion star. The exact nature of the progenitors and the relative importance of these processes are still open questions. One relatively unexplored method to constrain the progenitors is to search for high-mass X-ray binaries (HMXB) at SN locations in pre-explosion X-ray observations. In a HMXB, one star has already exploded as a core-collapse SN, producing a neutron star or a stellar-mass black hole. It is likely that the second star in the system will also explode as a supernova, which should cause a detectable long-term change in the system's X-ray luminosity. In particular, a pre-explosion detection of a HMXB coincident with a SN could be informative about the progenitor's nature. In this paper we analyze pre-explosion ACIS observations of 18 nearby type Ib, Ic and IIb supernovae from the Chandra X-ray observatory public archive. Two sources that could potentially be associated with the supernova are identified in the sample. Additionally we make similar post-explosion measurements for 46 SNe. Although our modelling indicates that progenitor systems with compact binary companions are probably quite rare, studies of this type can in the future provide more stringent constraints as the number of discovered nearby SNe and suitable pre-explosion X-ray data are both increasing.

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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