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THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR V532 MONOCEROTIS
He JJ(何家佳)1,2,3; Qian SB(钱声帮)1,2,4; Soonthornthum, B.3
Source PublicationASTRONOMICAL JOURNAL
2016-11-01
Volume152Issue:5Pages:120-127
DOI10.3847/0004-6256/152/5/120
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (V532 Mon)
Abstract

The first two sets of complete charge-coupled device light curves in the B and V bands of the short-period binary system, V532 Mon, are presented. The light curves are analyzed with spot models using the Wilson-Devinney code. V532 Mon is found to be an A-subtype intermediate-contact binary with a degree of contact factor of f= 47.1%(+/- 2.7%), a mass ratio of q= 0.2502(+/- 0.0019), and a cool spot on the primary component. The period changes of the system are investigated by combining newly determined times of light minimum with others published in the literature. We found that the general trend of the observed-calculated (O - C) curve shows a downward parabolic variation that corresponds to a long-term decrease in the orbital period at a rate of dP dt = -1.716(+/- 0.002) x 10(-7) dyr(-1). The long-term decrease of the orbital period can be explained by mass transfer from the more-massive component to the less massive one. The long-time period decrease, the intermediate-contact configuration, and the astrophysical parameters of the binary system suggest that V532 Mon will evolve into high fill-out, extreme mass-ratio overcontact binaries.

Funding ProjectChinese Natural Science Foundation[11203066] ; Chinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Science Foundation of Yunnan Province[2012HC011] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[XDB09010202] ; Key Laboratory Foundation of Chinese Academy of Sciences
Funding OrganizationChinese Natural Science Foundation[11203066, 11133007, 11325315] ; Science Foundation of Yunnan Province[2012HC011] ; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences[XDB09010202] ; Key Laboratory Foundation of Chinese Academy of Sciences
Language英语
Subject Area天文学 ; 恒星天文学 ; 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 Date2017-06-15
WOS IDWOS:000386614500001
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLIGHT ; CATALOG ; CURVES
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9755
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 AuthorHe JJ(何家佳)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650216 Kunming, China
2.Key Laboratory of the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P.O. Box 110, 650216 Kunming, China
3.National Astronomical Research Institute of Thailand, 191 Siriphanich Bidg. 2nd Fl. Huay Kaew Rd. Suthep District, Muang, Chiang Mai 50200, Thailand
4.University of the Chinese Academy of Science, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
He JJ,Qian SB,Soonthornthum, B.. THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR V532 MONOCEROTIS[J]. ASTRONOMICAL JOURNAL,2016,152(5):120-127.
APA He JJ,Qian SB,&Soonthornthum, B..(2016).THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR V532 MONOCEROTIS.ASTRONOMICAL JOURNAL,152(5),120-127.
MLA He JJ,et al."THE FIRST PHOTOMETRIC INVESTIGATION OF THE NEGLECTED W-UMa-TYPE BINARY STAR V532 MONOCEROTIS".ASTRONOMICAL JOURNAL 152.5(2016):120-127.
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