The Korean 1592-1593 Record of a Guest Star: An 'Impostor' of the Cassiopeia A Supernova?

IF 1.1 4区 物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS
Changbom Park, Sung-Chul Yoon, B. Koo
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引用次数: 2

Abstract

The missing historical record of the Cassiopeia A (Cas A) supernova (SN) event implies a large extinction to the SN, possibly greater than the interstellar extinction to the current SN remnant. Here we investigate the possibility that the guest star that appeared near Cas A in 1592{1593 in Korean history books could have been an `impostor" of the Cas A SN, i.e., a luminous transient that appeared to be a SN but did not destroy the progenitor star, with strong mass loss to have provided extra circumstellar extinction. We first review the Korean records and show that a spatial coincidence between the guest star and Cas A cannot be ruled out, as opposed to previous studies. Based on modern astrophysical findings on core-collapse SN, we argue that Cas A could have had an impostor and derive its anticipated properties. It turned out that the Cas A SN impostor must have been bright (M V = -14.7 ± 2:2 mag) and an amount of dust with visual extinction of ≥ 2.8 ± 2:2 mag should have formed in the ejected envelope and/or in a strong wind afterwards. The mass loss needs to have been spherically asymmetric in order to see the light echo from the SN event but not the one from the impostor event.
韩国1592-1593年的客串星记录:仙后座a超新星的“骗子”?
仙后座A (Cas A)超新星(SN)事件的历史记录缺失意味着SN的大灭绝,可能大于当前SN遗迹的星际灭绝。在这里,我们研究了一种可能性,即1592年(1593年)在韩国历史书中出现在天仙座A附近的客星可能是天仙座A SN的“冒名冒名者”,即一颗发光的瞬变恒星,它看起来是一颗SN,但没有摧毁它的前身恒星,它的质量损失很大,提供了额外的星周灭绝。我们首先回顾了韩国的记录,并表明不能排除客串星和Cas a之间的空间巧合,这与之前的研究相反。基于对核心坍缩SN的现代天体物理学发现,我们认为Cas A可能有一个冒名者,并推导出其预期的性质。结果表明,casa SN冒充星一定是明亮的(mv = -14.7±2:2等),并且在喷出的包层和/或之后的强风中应该形成了一定数量的视差≥2.8±2:2等的尘埃。质量损失必须是球不对称的,这样才能看到来自SN事件的光回波,而不是来自冒名顶替事件的光回波。
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来源期刊
Journal of the Korean Astronomical Society
Journal of the Korean Astronomical Society 地学天文-天文与天体物理
CiteScore
1.30
自引率
10.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: JKAS is an international scientific journal publishing papers in all fields of astronomy and astrophysics. All manuscripts are subject to the scrutiny of referees. Manuscripts submitted to JKAS must comply with the ethics policy of JKAS. Six regular issues are published each year on February 28, April 30, June 30, August 31, October 31, and December 31. One year''s issues compose one volume.
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