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

doi:10.3847/1538-4357/ad0a65

	The Formation of Blue Large-amplitude Pulsators from White-dwarf Main-sequence Star Mergers
	Zhang, Xianfei 5,6; Jeffery, C. Simon 4; Su J(苏杰)1,2,3; Bi, Shaolan 5,6
刊名	ASTROPHYSICAL JOURNAL
	2023-12-01
卷号	959 期号:1
ISSN号	0004-637X
DOI	10.3847/1538-4357/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
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关键词	SUBDWARF-B-STARS ; CONVECTIVE BOUNDARIES ; EVOLUTIONARY STATUS ; VARIABLE-STARS ; COOLING CURVE ; BINARY STARS ; GAIA DR2 ; MODULES ; OSCILLATIONS ; PULSATIONS
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:001112040500001
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
内容类型	期刊论文
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
作者单位	1.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 2.International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, People's Republic of China 3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, People's Republic of China; 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.Institute for Frontier in Astronomy and Astrophysics, Beijing Normal University, Beijing 102206, People's Republic of China; zxf@bnu.edu.cn;
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).