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FIRST PHOTOMETRIC INVESTIGATION OF THE SOLAR-TYPE CONTACT BINARY GSC 1537-1557
Xiang, FY1; Xiao, TY1; Zhang B(张斌)2,3,4; Shi XD(施相东)2,3
Source PublicationASTRONOMICAL JOURNAL
2015-07
Volume150Issue:1
DOI10.1088/0004-6256/150/1/9
Contribution Rank第2完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Individual (Gsc 1537-1557)
Abstract

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.

Funding ProjectChinese Natural Science Foundation[11273022] ; Chinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Program for Changjiang Scholars and Innovative Research Team in University[IRT13093]
Funding OrganizationChinese Natural Science Foundation[11273022, 11133007, 11325315] ; Program for Changjiang Scholars and Innovative Research Team in University[IRT13093]
Language英语
Subject Area天文学 ; 天体物理学 ; 实测天体物理学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-6256
URL查看原文
WOS IDWOS:000357744400009
WOS Research AreaPharmacology & Pharmacy ; Toxicology
WOS SubjectPharmacology & Pharmacy ; Toxicology
WOS KeywordURSAE MAJORIS SYSTEMS ; THERMAL RELAXATION OSCILLATION ; 4-COLOR LIGHT CURVES ; HIGH FILL-OUT ; PERIOD CHANGES ; MASS-RATIO ; ECLIPSING BINARY ; SHALLOW CONTACT ; STAR LIGHT ; LEONIS-MINORIS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5916
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 AuthorXiang, FY
Affiliation1.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
Recommended Citation
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).
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