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The Formation of Blue Large-amplitude Pulsators from White-dwarf Main-sequence Star Mergers

文献类型：期刊论文

作者Zhang, Xianfei3,5; Jeffery, C. Simon4; Su J(苏杰)1,2,6; Bi, Shaolan3,5
刊名ASTROPHYSICAL JOURNAL
出版日期2023-12-01
卷号959期号:1
ISSN号0004-637X
DOI10.3847/1538-4357/ad0a65
产权排序第4完成单位
文献子类Article
英文摘要Blue large-amplitude pulsators (BLAPs) are hot low-mass stars that show large-amplitude light variations likely due to radial oscillations driven by iron group opacities. Period changes provide evidence of both secular contraction and expansion among the class. Various formation histories have been proposed, but none are completely satisfactory. Zhang et al. proposed that the merger of a helium-core white dwarf with a low-mass main-sequence star (HeWD+MS) can lead to the formation of some classes of hot subdwarfs. We have analyzed these HeWD+MS merger models in more detail. Between helium-shell ignition and full helium-core burning, the models pass through the volume of luminosity-gravity-temperature space occupied by BLAPs. Periods of expansion and contraction associated with helium-shell flashes can account for the observed rates of period change. We argue that the HeWD+MS merger model provides at least one BLAP formation channel.
学科主题天文学
URL标识查看原文
出版地TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
WOS关键词SUBDWARF-B-STARS ; CONVECTIVE BOUNDARIES ; EVOLUTIONARY STATUS ; VARIABLE-STARS ; COOLING CURVE ; BINARY STARS ; GAIA DR2 ; MODULES ; OSCILLATIONS ; PULSATIONS
资助项目National Natural Science Foundation of China[12073006]; National Natural Science Foundation of China[12090040]; National Natural Science Foundation of China[12090042]; National Natural Science Foundation of China[12288102]; National Natural Science Foundation of China[12133011]; National Natural Science Foundation of China[11833006]; National Natural Science Foundation of China (NSFC)[U2031203]; Chinese Academy of Sciences (CAS); CAS Light of West China Program; China Manned Space Project[CMS-CSST-2021-A10]; Northern Ireland Department for Communities
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号WOS:001112040500001
出版者IOP Publishing Ltd
资助机构National Natural Science Foundation of China[12073006, 12090040, 12090042, 12288102, 12133011, 11833006] ; National Natural Science Foundation of China (NSFC)[U2031203] ; Chinese Academy of Sciences (CAS) ; CAS Light of West China Program ; China Manned Space Project[CMS-CSST-2021-A10] ; Northern Ireland Department for Communities
版本出版稿
源URL[http://ir.ynao.ac.cn/handle/114a53/26458]  
专题云南天文台_恒星物理研究组
云南天文台_中国科学院天体结构与演化重点实验室
作者单位1.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China;
2.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China;
3.Institute for Frontier in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, People's Republic of China; zxf@bnu.edu.cn;
4.Armagh Observatory and Planetarium, College Hill, Armagh BT61 9DG, UK;
5.Department of Astronomy, Beijing Normal University, Beijing 100875, People's Republic of China;
6.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China
推荐引用方式
GB/T 7714		 Zhang, Xianfei,Jeffery, C. Simon,Su J,et al. The Formation of Blue Large-amplitude Pulsators from White-dwarf Main-sequence Star Mergers[J]. ASTROPHYSICAL JOURNAL,2023,959(1).
APA Zhang, Xianfei,Jeffery, C. Simon,苏杰,&Bi, Shaolan.(2023).The Formation of Blue Large-amplitude Pulsators from White-dwarf Main-sequence Star Mergers.ASTROPHYSICAL JOURNAL,959(1).
MLA Zhang, Xianfei,et al."The Formation of Blue Large-amplitude Pulsators from White-dwarf Main-sequence Star Mergers".ASTROPHYSICAL JOURNAL 959.1(2023).

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来源：云南天文台

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