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The Helium Common-envelope Wind Scenario for SN 2020eyj

文献类型：期刊论文

作者Meng XC(孟祥存)1; Podsiadlowski, Philipp2,3
刊名ASTROPHYSICAL JOURNAL
出版日期2026-01-20
卷号997期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/ae28da
产权排序第1完成单位
文献子类Article
英文摘要SN 2020eyj is the first Type Ia supernova (SN Ia) showing the signature of compact helium-rich circumstellar material (CSM). Such a large amount of CSM is difficult to explain in a single-degenerate scenario where the donor star is a helium star. Here we show that, under certain conditions, it is possible that the transfer of helium leads to a common envelope (CE) engulfing the system, similar to the CE wind model proposed by X. Meng & P. Podsiadlowski. If in such a helium CE wind model the initial white dwarf mass is larger than 1.1 M circle dot and the helium star is more massive than 1.8 M circle dot, the mass of a helium CE can be larger than 0.3 M circle dot prior to supernova explosion. The CE mass heavily depends on the initial parameters of the binary system. A dynamical CE ejection event could occur shortly before the supernova, and then our model may naturally explain the properties of SN 2020eyj, specifically the massive He-rich CSM, and its dim peak brightness, low ejecta velocity, and low birth rate.
学科主题天文学 ; 恒星与银河系
URL标识查看原文
出版地No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND
WOS关键词EXPLOSION DELAY-TIME ; WHITE-DWARF MODELS ; IA SUPERNOVAE ; PTF 11KX ; PROGENITORS ; MASS ; COMPANIONS ; EVOLUTION
资助项目Yunnan Fundamental Research Projects[202401BC070007]; The National Natural Science Foundation of China[12333008]
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001662364700001
出版者IOP Publishing Ltd
资助机构Yunnan Fundamental Research Projects[202401BC070007] ; The National Natural Science Foundation of China[12333008]
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/28853]  
专题云南天文台_大样本恒星演化研究组
通讯作者Meng XC(孟祥存)
作者单位1.International Centre of Supernovae (ICESUN), Yunnan Key Laboratory of Supernova Research, Yunnan Observatories, Chinese Academy of Sciences (CAS), Kunming 650216, People’s Republic of China; xiangcunmeng@ynao.ac.cn;
2.London Centre for Stellar Astrophysics, Vauxhall, London, UK; podsi@hotmail.com;
3.University of Oxford, St Edmund Hall, Oxford, OX1 4AR, UK
推荐引用方式
GB/T 7714		 Meng XC,Podsiadlowski, Philipp. The Helium Common-envelope Wind Scenario for SN 2020eyj[J]. ASTROPHYSICAL JOURNAL,2026,997(1).
APA 孟祥存,&Podsiadlowski, Philipp.(2026).The Helium Common-envelope Wind Scenario for SN 2020eyj.ASTROPHYSICAL JOURNAL,997(1).
MLA 孟祥存,et al."The Helium Common-envelope Wind Scenario for SN 2020eyj".ASTROPHYSICAL JOURNAL 997.1(2026).

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来源：云南天文台

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