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First Photometric Investigation of the Neglected EW-type Binary System V502 Her
Zhao EG(赵二刚)1,2,3,4; Qian SB(钱声帮)1,2,3,4; Liao WP(廖文萍)1,2,3; He JJ(何家佳)1,2,3; Shi XD(施相东)1,2,3; Zhang J(张嘉)1,2,3
Source PublicationPUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
2018-04-01
Volume130Issue:986
DOI10.1088/1538-3873/aaa886
Contribution Rank第1完成单位
Indexed BySCI
Keyword(Stars:) Binaries: Eclipsing (Stars:) Binaries: Spectroscopic (Stars:) Binaries (Including Multiple): Close
Abstract

V502 Her is a neglected EW-type binary, which has been known for more than 60 years. The first multi-color CCD photometric light curve and spectroscopic observations of contact binary V502 Her was obtained. Based on the LAMOST data, its spectrum can be found to be F5. Together with solutions of light curves by using the Wilson-Devinney code, it infers that V502 Her is an A-type W UMa contact binary system with the mass ratio of q = 0.313 and the filling factor of f = 38.1%. According to all minimum times from the literature and our observations, the orbital period was analyzed and a long-term increase with a periodic change (P-3 = 26.8 years) was computed. The orbital period increase may be caused by the mass transfer from a less-massive component to the more massive one, which indicates that V502 Her is in the thermal relaxation oscillation (TRO) controller stage, while the light-travel time effect (LTTE) through the presence of a cool third body may lead to the periodic variation.

Funding ProjectChinese Natural Science Foundation[11133007]
Funding OrganizationChinese Natural Science Foundation[11133007]
Language英语
Subject Area天文学 ; 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
ISSN0004-6280
URL查看原文
WOS IDWOS:000427391300001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordTHERMAL RELAXATION OSCILLATION ; LIGHT-CURVE ; ADDITIONAL COMPONENTS ; CONTACT BINARIES ; CLOSE BINARIES ; PERIOD CHANGES
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12294
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 AuthorZhao EG(赵二刚)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650216 Kunming, People's Republic of China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216 Kunming, People's Republic of China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing, 100012, People's Republic of China
4.University of the Chinese Academy of Sciences, Yuquan Road 19#, Shijingshan Block, 100049 Beijing, People's Republic of China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhao EG,Qian SB,Liao WP,et al. First Photometric Investigation of the Neglected EW-type Binary System V502 Her[J]. PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,2018,130(986).
APA Zhao EG,Qian SB,Liao WP,He JJ,Shi XD,&Zhang J.(2018).First Photometric Investigation of the Neglected EW-type Binary System V502 Her.PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC,130(986).
MLA Zhao EG,et al."First Photometric Investigation of the Neglected EW-type Binary System V502 Her".PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC 130.986(2018).
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