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1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF
Jiang LQ(江林巧)1,2,3; Qian SB(钱声帮)1,2,3; Zhang J(张嘉)1,2,3; Zhou X(周肖)1,2,3
Source PublicationASTRONOMICAL JOURNAL
2015-05
Volume149Issue:5
DOI10.1088/0004-6256/149/5/169
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (1swasp j074658.62+224448.5)
Abstract

The first sets of high-quality light curves of the extremely short period eclipsing binary 1SWASP J074658.62+224448.5 (hereafter J074658) were obtained in 2012 and 2014. The photometric solutions were derived using the 2013 version of the Wilson-Devinney code. Two different modes of overcontact binaries were used to analyze the light curves, and the adopted solutions show that J074658 is a shallow contact system (the degree of contact is f = 13.1 +/- 2.1%) with a mass ratio of q= 0.386 +/- 0.017. The two components have very close temperatures, which may indicate that J074658 is in thermal contact. The variation of the orbital period was studied using all the available times of minimum light. According to the O - C diagram, the orbital period of J074658 shows an increase at a rate of P = 5.39 10(-7) days yr(-1) in about an eight-year span. The reasons for the period increase compared with other well-studied contact binaries with extremely short periods are discussed. The period increase may be caused by mass transfer from the less massive component to the more massive one, or it could be only part of a long period cyclic variation that may reveal the presence of a third body. In this paper, the latter is suggested.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[111325315] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011] ; Science Foundation of Yunnan Province[2013FB084]
Funding OrganizationChinese Natural Science Foundation[11133007, 11325315] ; Strategic Priority Research Program "The Emergence of Cosmological Structure" of the Chinese Academy of Sciences[XDB09010202] ; Science Foundation of Yunnan Province[2012HC011, 2013FB084]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星形成与演化
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
Archive Date2015-06-04
WOS IDWOS:000354065200020
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordCC-COMAE BERENICES ; SHALLOW CONTACT ; ECLIPSING BINARIES ; VELOCITY CURVES ; LIGHT CURVES ; STAR LIGHT ; LIMIT ; SYSTEM ; PARAMETERS ; CANDIDATES
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5918
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 AuthorJiang LQ(江林巧)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
3.Graduate University of the Chinese Academy of Sciences, Yuquan Road 19, Sijingshang Block, 100049 Beijing City, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Jiang LQ,Qian SB,Zhang J,et al. 1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF[J]. ASTRONOMICAL JOURNAL,2015,149(5).
APA Jiang LQ,Qian SB,Zhang J,&Zhou X.(2015).1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF.ASTRONOMICAL JOURNAL,149(5).
MLA Jiang LQ,et al."1SWASP J074658.62+224448.5: A LOW MASS-RATIO CONTACT BINARY AT THE PERIOD CUTOFF".ASTRONOMICAL JOURNAL 149.5(2015).
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