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PHOTOMETRIC INVESTIGATION OF THE TOTALLY ECLIPSING CONTACT BINARY V12 IN THE INTERMEDIATE-AGE OPEN CLUSTER NGC 7789
Qian SB(钱声帮)1,2,3; Essam, A4; Wang JJ(王晶晶)1,2,3; Ali, GB4; Liu L(刘亮)1,2,3; Haroon, AA4,5; Zhou X(周肖)1,2,3
Source PublicationASTRONOMICAL JOURNAL
2015-02
Volume149Issue:2
DOI10.1088/0004-6256/149/2/38
Contribution Rank第1完成单位
Indexed BySCI
KeywordBinaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (V12 In Ngc 7789)
Abstract

NGC 7789 is an intermediate-age open cluster with an age similar to the mean age of contact binary stars. V12 is a bright W UMa-type binary star with an orbital period of 0.3917 days. The first complete light curves of V12 in the V, R, and I bands are presented and analyzed with the Wilson-Devinney (W-D) method. The results show that V12 is an intermediate-contact binary (f = 43.0(+/- 2.2)%) with a mass ratio of 3.848, and it is a W-type contact binary where the less massive component is slightly hotter than the more massive one. The asymmetry of the light curves is explained by the presence of a dark spot on the more massive component. The derived orbital inclination (i = 83 degrees.6) indicates that it is a totally eclipsing binary, which suggests that the determined parameters are reliable. The orbital period may show a long-term increase at a rate of (P)over dot = +2.48(+/- 0.17) x 10(-6) days yr(-1). that reveals a rapid mass transfer from the less massive component to the more massive one. However, more observations are needed to confirm this conclusion. The presence of an intermediate-contact binary in an intermediate-age open cluster may suggest that some contact binaries have a very short pre-contact timescale. The presence of a third body and/or stellar collision may help to shorten the pre-contact evolution.

Funding ProjectChinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[11325315] ; Chinese Natural Science Foundation[11103074] ; STDF (Science and Technological Development Fund, Ministry for Scientific Research, Egypt)[1335]
Funding OrganizationChinese Natural Science Foundation[11133007, 11325315, 11103074] ; STDF (Science and Technological Development Fund, Ministry for Scientific Research, Egypt)[1335]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 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 Date2015-02-10
WOS IDWOS:000349360200003
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordMAJORIS TYPE BINARIES ; VARIABLE-STARS ; MASS-TRANSFER ; CLOSE-BINARY ; LIGHT CURVES ; FIELD ; EVOLUTION ; NGC-7789 ; CATALOG ; SYSTEMS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5922
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 AuthorQian SB(钱声帮)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences (CAS), P.O. Box 110, 650011 Kunming, China
2.Key Laboratory of the Structure and Evolution of Celestial Bodies, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, China
3.University of the Chinese Academy of Sciences, Yuquan Road 19#, Sijingshang Block, 100049 Beijing, China
4.National Research Institute of Astronomy and Geophysics, Department of Astronomy, Helwan, Cairo, Egypt
5.Astronomy Department, Faculty of Science, King Abdul Aziz University, Jeddah, Saudi Arabia
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Qian SB,Essam, A,Wang JJ,et al. PHOTOMETRIC INVESTIGATION OF THE TOTALLY ECLIPSING CONTACT BINARY V12 IN THE INTERMEDIATE-AGE OPEN CLUSTER NGC 7789[J]. ASTRONOMICAL JOURNAL,2015,149(2).
APA Qian SB.,Essam, A.,Wang JJ.,Ali, GB.,Liu L.,...&Zhou X.(2015).PHOTOMETRIC INVESTIGATION OF THE TOTALLY ECLIPSING CONTACT BINARY V12 IN THE INTERMEDIATE-AGE OPEN CLUSTER NGC 7789.ASTRONOMICAL JOURNAL,149(2).
MLA Qian SB,et al."PHOTOMETRIC INVESTIGATION OF THE TOTALLY ECLIPSING CONTACT BINARY V12 IN THE INTERMEDIATE-AGE OPEN CLUSTER NGC 7789".ASTRONOMICAL JOURNAL 149.2(2015).
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