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Identification of a deep contact binary in the field of the globular cluster 47 Tuc
Liu L(刘亮)1,2; Qian SB(钱声帮)1,2; Lajus, EF3,4; Liu, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊NEW ASTRONOMY
2014-01
卷号26页码:116-120
DOI10.1016/j.newast.2013.07.004
产权排序第1完成单位
收录类别SCI
关键词Stars: Binaries: Eclipsing Stars: Individual (V95 47 Tuc)
摘要Three light curves of the eclipsing binary V95-47 Tuc were obtained in serval nights from December, 2010 to November, 2011. By analyzing the light curves with the 2010 version of the W-D code, the mass-ratio and the fill-out factor of V95 are determined as 0.164 and 53.8%, respectively. It is sure that this contact binary is a foreground object of the globular cluster 47 Tuc. By comparing to the Dartmouth model isochrones, the masses and the radii of the component stars are estimated, as well as the age and the distance. They are, M-1 = 0.97M(circle dot), M-2 = 0.16M(circle dot), R-1 = 1.05R(circle dot), R-2 = 0.49R(circle dot), Age = 7.0 Gyr and Dist = 1570 pc. The cool spots model is introduced in the BV-band photometric solutions because of the observed O'Connell effect. We compare the two modeling cool spots in size, temperature and position, thinking that they could be the same one. It can be explained as that a cool spot, which is on the surface of the more massive component, shifted 126 degrees along the latitude line from west to east in a year. This phenomenon may be called as starspot migration. (C) 2013 Published by Elsevier B.V.
项目资助者Chinese Natural Science Foundation [11103074, 11133007, 10973037, 11203066, 10903026] ; West Light Foundation of the Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN1384-1076
URL查看原文
归档日期2015-07-20
WOS记录号WOS:000325510600014
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]VELOCITY CURVES ; VARIABLE-STARS ; LIGHT
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5910
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Liu, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, P.O. Box 110, 650011 Kunming, PR China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, PR China
3.Facultad de Ciencias Astronómicasy Geofísicas, Universidad Nacional de La Plata, 1900 La Plata, Buenos Aires, Argentina
4.Instituto de Astrofśica de La Plata (CCT La Plata-CONICET, UNLP), Argentina
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Liu L,Qian SB,Lajus, EF,et al. Identification of a deep contact binary in the field of the globular cluster 47 Tuc[J]. NEW ASTRONOMY,2014,26:116-120.
APA Liu L,Qian SB,Lajus, EF,&Liu, L .(2014).Identification of a deep contact binary in the field of the globular cluster 47 Tuc.NEW ASTRONOMY,26,116-120.
MLA Liu L,et al."Identification of a deep contact binary in the field of the globular cluster 47 Tuc".NEW ASTRONOMY 26(2014):116-120.
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