Formation of Extremely Low-mass White Dwarfs in Wide Orbits
文献类型：期刊论文
| 作者 | Zhang, Yangyang2; Li, Zhenwei1,3; Chen, Xuefei1,3 |
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2026-02-25 |
| 卷号 | 26期号:2页码:6 |
| 关键词 | (stars:) binaries (including multiple): close stars: evolution (stars:) white dwarfs |
| ISSN号 | 1674-4527 |
| DOI | 10.1088/1674-4527/ae2222 |
| 通讯作者 | Zhang, Yangyang(zhangyy@zknu.edu.cn) |
| 英文摘要 | Helium white dwarfs (WDs) with masses less than 0.3 M-circle dot are known as extremely low-mass WDs (ELM WDs), which cannot be produced by single stellar evolution in theory. Generally, these stars are believed to form through binary interactions. Recently, two ELM WDs in unusually wide orbits were reported, i.e., KIC 8145411 and HE 0430-2457. Their orbital separations are too wide to be produced by the binary evolution scenario. In this work, we study the formation of wide-orbit ELM WD binaries from hierarchical triple systems. In this scenario, an ELM WD is formed from the inner binary and subsequently forms a wide binary system with the third object. We find that the merger of an evolved star with a brown dwarf in the inner binary fails to produce single ELM WDs, but Type Ia supernovae (SNe Ia) explosions can successfully do so. Furthermore, we investigate the impact of the supernova explosion on the orbital distribution of the surviving binary and find that this channel may have a probability of reproducing the orbital parameters of HE 0430-2457, but fails to reproduce the observed features of KIC 8145411. This supports recent observational recalibrations suggesting that KIC 8145411 resides in a triple system rather than a binary. |
| WOS关键词 | BROWN-DWARF ; IA SUPERNOVAE ; CONVECTIVE BOUNDARIES ; ENVELOPE EJECTION ; COMPLETE SAMPLE ; BINARIES ; ASTROPHYSICS ; EVOLUTION ; MODULES ; PLANETS |
| 资助项目 | Stellar Astrophysics Group at Yunnan Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC)[12288102] ; National Natural Science Foundation of China (NSFC)[12125303] ; National Natural Science Foundation of China (NSFC)[12090040/3] ; National Natural Science Foundation of China (NSFC)[12473034] ; National Key R&D Program of China[2021YFA1600403] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB1160303] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB1160000] ; International Centre of Supernovae, Yunnan Key Laboratory[202302AN360001] ; Yunnan Revitalization Talent Support Program -- Science & Technology Champion Project[202305AB350003] ; Yunnan Fundamental Research Project[202401AT070139] ; Natural Science Foundation of Henan Province[242300420944] ; New Cornerstone Science Foundation through the XPLORER PRIZE |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:001643615600001 |
| 出版者 | IOP Publishing Ltd |
| 资助机构 | Stellar Astrophysics Group at Yunnan Observatories, Chinese Academy of Sciences ; National Natural Science Foundation of China (NSFC) ; National Key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; International Centre of Supernovae, Yunnan Key Laboratory ; Yunnan Revitalization Talent Support Program -- Science & Technology Champion Project ; Yunnan Fundamental Research Project ; Natural Science Foundation of Henan Province ; New Cornerstone Science Foundation through the XPLORER PRIZE |
| 源URL | [http://ir.ynao.ac.cn/handle/114a53/28843]  |
| 专题 | 云南天文台_大样本恒星演化研究组 |
| 通讯作者 | Zhang, Yangyang |
| 作者单位 | 1.Chinese Acad Sci, Int Ctr Supernovae ICESUN, Yunnan Key Lab Supernova Res, Yunnan Observ, Kunming 650216, Peoples R China 2.Zhoukou Normal Univ, Zhoukou 466001, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Yangyang,Li, Zhenwei,Chen, Xuefei. Formation of Extremely Low-mass White Dwarfs in Wide Orbits[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2026,26(2):6. |
| APA | Zhang, Yangyang,Li, Zhenwei,&Chen, Xuefei.(2026).Formation of Extremely Low-mass White Dwarfs in Wide Orbits.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,26(2),6. |
| MLA | Zhang, Yangyang,et al."Formation of Extremely Low-mass White Dwarfs in Wide Orbits".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 26.2(2026):6. |
入库方式： OAI收割
来源：云南天文台
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