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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; Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTRONOMICAL JOURNAL
2015-02
卷号149期号:2
DOI10.1088/0004-6256/149/2/38
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Stars: Evolution Stars: Individual (V12 In Ngc 7789)
摘要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.
项目资助者Chinese Natural Science Foundation [11133007, 11325315, 11103074] ; STDF (Science and Technological Development Fund, Ministry for Scientific Research, Egypt) [1335]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6256
URL查看原文
归档日期2015-02-10
WOS记录号WOS:000349360200003
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]MAJORIS TYPE BINARIES ; VARIABLE-STARS ; MASS-TRANSFER ; CLOSE-BINARY ; LIGHT CURVES ; FIELD ; EVOLUTION ; NGC-7789 ; CATALOG ; SYSTEMS
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5922
专题双星与变星研究组
中国科学院天体结构与演化重点实验室
通讯作者Qian, SB (reprint author), Chinese Acad Sci, Yunnan Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.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
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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.,...&Qian, SB .(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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