Physical properties and evolutionary status of the W-subtype contact binary V502 Oph with a stellar companion

	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 Binghe 1,2,3; Li H(李昊)1,3 ; Zhang J(张嘉)1,2
刊名	PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
	2016-12-01
卷号	68 期号:6
关键词	binaries: close binaries: eclipsing stars: individual: V502 Oph
ISSN号	0004-6264
通讯作者	Zhou, X
产权排序	第1完成单位
英文摘要	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.
学科主题	天文学
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	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
收录类别	SCI
原文出处	https://academic.oup.com/pasj/article-abstract/68/6/102/2664385/Physical-properties-and-evolutionary-status-of-the?redirectedFrom=fulltext
语种	英语
WOS记录号	WOS:000391295100014
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/9875]
专题	云南天文台_双星与变星研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.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
推荐引用方式 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).