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Physical properties and evolutionary status of the W-subtype contact binary V502 Oph with a stellar companion
Zhou X(周肖)1,2,3; Qian SB(钱声帮)1,2,3; Huang Binghe1,2,3; Li H(李昊)1,3; Zhang J(张嘉)1,2
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2016-12-01
Volume68Issue:6
DOI10.1093/pasj/psw094
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Individual: V502 Oph
Abstract

Multi-color (B, V, R-c, I-c) CCD photometric light curves of the contact binary V502 Oph are analyzed using the Wilson-Devinney program. The solutions reveal that V502 Oph is a W-subtype contact (f = 35.3%) binary system. The temperature difference between its two components is 240 K and the more massive star has a lower surface temperature. A cool spot is added in our model to account for the light curves' asymmetry (O'Connell effect) and a third light is detected for the first time in the light curves' modeling. Combining the orbital inclination (i = 76 degrees.4) with the published mass function of V502 Oph, the absolute physical parameters of the two components are determined, which are M-1 = 0.46(+/- 0.02) M-circle dot, M-2 = 1.37(+/- 0.02) M-circle dot, R-1 = 0.94(+/-0.01) R-1, R-2 = 1.51(+/-0.01) R-circle dot, L-1 = 1.13(+/-0.02) L-circle dot, and L-2 = 2.49(+/-0.03) L-circle dot. The formation and the evolutionary status of V502 Oph are discussed. All photoelectric and CCD times of light minimum about V502 Oph are gathered and its orbital period variations are analyzed. The results show that the orbital period of V502 Oph is decreasing continuously at a rate of dP/dt = -1.69 x 10(-7) dyr(-1), which corresponds to a conservative mass transfer rate of dM(2)/ dt = -3.01 x 10(-8) M-circle dot yr(-1). The light-travel time effect is due to the presence of a close-in tertiary component with a period of P-3 = 18.7 yr and an amplitute of 0.00402 d. V502 Oph is an ideal target to test the formation and evolution theories of binary andmultiple systems in which the light curves, the O - C curve and spectroscopic observations are comprehensively researched.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Chinese Natural Science Foundation[11203066] ; Chinese Natural Science Foundation[11403095] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011, 2014FB187]
Funding OrganizationChinese Natural Science Foundation[11133007, 11325315, 11203066, 11403095] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011, 2014FB187]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学 ; 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
ISSN0004-6264
URL查看原文
Archive Date2017-05-18
WOS IDWOS:000391295100014
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS Keyword1ST PHOTOMETRIC ANALYSIS ; VELOCITY CURVE ANALYSIS ; V 502 OPHIUCHI ; ECLIPSING BINARIES ; PERIOD VARIATION ; LIGHT CURVES ; PHOTOELECTRIC OBSERVATIONS ; ADDITIONAL COMPONENTS ; RADIAL-VELOCITY ; AI-PHE
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9875
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 AuthorZhou X(周肖)
Affiliation1.Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650216, Peoples R China
2.Chinese Acad Sci, Key Lab Struct & Evolut Celestial Objects, POB 110, Kunming 650216, Peoples R China
3.Chinese Acad Sci, Grad Univ, Yuquan Rd 19,Sijingshang Block, Beijing 100049, Peoples R China
4.NARIT, Chiang Mai 50200, Thailand
Recommended Citation
GB/T 7714
Zhou X,Qian SB,Huang Binghe,et al. Physical properties and evolutionary status of the W-subtype contact binary V502 Oph with a stellar companion[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,2016,68(6).
APA Zhou X,Qian SB,Huang Binghe,Li H,&Zhang J.(2016).Physical properties and evolutionary status of the W-subtype contact binary V502 Oph with a stellar companion.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN,68(6).
MLA Zhou X,et al."Physical properties and evolutionary status of the W-subtype contact binary V502 Oph with a stellar companion".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN 68.6(2016).
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