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Different evolutionary pathways for the two subtypes of contact binaries
Zhang XD(张旭东)1,2; Qian SB(钱声帮)1,2,3,4; Liao WP(廖文萍)1,3,4
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2020-03-01
Volume492Issue:3Pages:4112-4119
DOI10.1093/mnras/staa079
Contribution Rank第1完成单位
Indexed BySCI
Keywordbinaries: eclipsing stars: evolution stars: formation
Abstract

Secondary components of W UMa-type contact binaries (CBs) have many special properties, two of them arc excess in radius and luminosity. In order to make these specialties clear, we propose radial density distribution to roughly detect lie interior structure of the secondaries in CBs. By comparing the radial density distribution between secondary components of CBs and main-sequence stars, we find the radial density distribution of secondaries in A-subtype CBs are similar to main-sequence stars whose masses higher than 1.8 M-sun, which suggests that these two kinds of stars may have some evolutionary relationship. While secondary components of W-subtype CBs are closely connected with stars whose masses lower than 1.8 M-sun. Then, we investigate the mass-luminosity relation of secondaries in CBs, the big differences between two subtypes suggests that the overluminosity of secondaries in these two subtypes are caused by two different reasons. Overluminosity in A-subtype is because the secondary components are evolved from initial more massive stars, while in W-subtype is due to energy transfer.

Funding ProjectNational Natural Science Foun-dation of China[11933008] ; National Natural Science Foun-dation of China[11873017] ; Science and Technology Talents, and Platform Plan of Yunnan province[2018HB070]
Funding OrganizationNational Natural Science Foun-dation of China[11933008, 11873017] ; Science and Technology Talents, and Platform Plan of Yunnan province[2018HB070]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000518143200073
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLIGHT-CURVE ANALYSIS ; THERMAL RELAXATION OSCILLATION ; ORBITAL PERIOD CHANGES ; URSAE-MAJORIS SYSTEMS ; UMA-TYPE BINARIES ; PHYSICAL PARAMETERS ; ECLIPSING BINARY ; MASS-RATIO ; PHOTOMETRIC ANALYSIS ; NEAR-CONTACT
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/22540
Collection双星与变星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorZhang XD(张旭东); Qian SB(钱声帮)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences (CAS), 396 yangfangwang, Guandu District, Kunming 650216, P.R. China
2.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, Beijing 100049, P.R. China
3.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, P.R. China
4.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012, P.R. China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang XD,Qian SB,Liao WP. Different evolutionary pathways for the two subtypes of contact binaries[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2020,492(3):4112-4119.
APA Zhang XD,Qian SB,&Liao WP.(2020).Different evolutionary pathways for the two subtypes of contact binaries.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,492(3),4112-4119.
MLA Zhang XD,et al."Different evolutionary pathways for the two subtypes of contact binaries".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 492.3(2020):4112-4119.
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