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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; Zhou, X
发表期刊PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
2016-12-01
卷号68期号:6
DOI10.1093/pasj/psw094
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Individual: V502 Oph
摘要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.
项目资助者Chinese 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)
语种英语
学科领域天文学
文章类型Article
ISSN0004-6264
URL查看原文
归档日期2017-05-18
WOS记录号WOS:000391295100014
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]1ST PHOTOMETRIC ANALYSIS ; VELOCITY CURVE ANALYSIS ; V 502 OPHIUCHI ; ECLIPSING BINARIES ; PERIOD VARIATION ; LIGHT CURVES ; PHOTOELECTRIC OBSERVATIONS ; ADDITIONAL COMPONENTS ; RADIAL-VELOCITY ; AI-PHE
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/9875
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Zhou, X
作者单位1.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
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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,&Zhou, X.(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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