FIRST PHOTOMETRIC INVESTIGATION OF THE SOLAR-TYPE CONTACT BINARY GSC 1537-1557

	FIRST PHOTOMETRIC INVESTIGATION OF THE SOLAR-TYPE CONTACT BINARY GSC 1537-1557
	Xiang, FY1 ; Xiao, TY 1; Zhang B(张斌)2,3,4 ; Shi XD(施相东)2,3
刊名	ASTRONOMICAL JOURNAL
	2015-07
卷号	150 期号:1
关键词	binaries: close binaries: eclipsing stars: individual (GSC 1537-1557)
ISSN号	0004-6256
通讯作者	Xiang, FY (reprint author), Xiangtan Univ, Dept Phys, Xiangtan 411105, Funan Province, Peoples R China.
产权排序	第二完成单位
英文摘要	By analyzing R-c and I-c light curves of the short-period solar-type eclipsing binary GSC 1537-1557 we discovered that it is a shallow contact binary with a degree of contact factor of f = (8.10 +/- 1.79)%. Photometric solutions reveal that GSC 1537-1557 is a W-type system with a mass ratio of q = M-2/M-1 = 2.645 where the less massive component (the primary star) is about 110 K hotter than the more massive one (the secondary star). The asymmetry and variation of the light curves were explained as the activity of spots on the solar-type component stars. By investigating all of the available times of light minima, we found that the observed-calculated (O-C) curve shows a cyclic variation with a small amplitude of 0.00335 days and a period of 8.1 years. The small-amplitude cyclic change in the O - C curve was analyzed for the light-travel time effect via the presence of an extremely cool stellar companion. The mass of the third body was determined to be M-3 sin i' =(0.19 +/- 0.01) M-circle dot when M-1 + M-2 = 1.31 M-circle dot is adopted for GSC 1537-1557. The semimajor axis of the outer obit is a' sin i' =(4.58 +/- 0.33) AU.
学科主题	Pharmacology & Pharmacy ; Toxicology
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Pharmacology & Pharmacy ; Toxicology
研究领域[WOS]	Pharmacology & Pharmacy ; Toxicology
关键词[WOS]	URSAE MAJORIS SYSTEMS ; THERMAL RELAXATION OSCILLATION ; 4-COLOR LIGHT CURVES ; HIGH FILL-OUT ; PERIOD CHANGES ; MASS-RATIO ; ECLIPSING BINARY ; SHALLOW CONTACT ; STAR LIGHT ; LEONIS-MINORIS
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-6256/150/1/9/meta
语种	英语
WOS记录号	WOS:000357744400009
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5916]
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.Physics Department, Xiangtan University, 411105 Xiangtan, Funan Province, P. R. China 2.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, P.R. China 3.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, P. R. China 4.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, P. R. China
推荐引用方式 GB/T 7714	Xiang, FY,Xiao, TY,Zhang B,et al. FIRST PHOTOMETRIC INVESTIGATION OF THE SOLAR-TYPE CONTACT BINARY GSC 1537-1557[J]. ASTRONOMICAL JOURNAL,2015,150(1).
APA	Xiang, FY,Xiao, TY,Zhang B,&Shi XD.(2015).FIRST PHOTOMETRIC INVESTIGATION OF THE SOLAR-TYPE CONTACT BINARY GSC 1537-1557.ASTRONOMICAL JOURNAL,150(1).
MLA	Xiang, FY,et al."FIRST PHOTOMETRIC INVESTIGATION OF THE SOLAR-TYPE CONTACT BINARY GSC 1537-1557".ASTRONOMICAL JOURNAL 150.1(2015).