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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
Source PublicationNEW ASTRONOMY
2014-01
Volume26Pages:116-120
DOI10.1016/j.newast.2013.07.004
Contribution Rank第1完成单位
Indexed BySCI
KeywordStars: Binaries: Eclipsing Stars: Individual (V95 47 Tuc)
Abstract

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.

Funding ProjectChinese Natural Science Foundation[11103074] ; Chinese Natural Science Foundation[11133007] ; Chinese Natural Science Foundation[10973037] ; Chinese Natural Science Foundation[11203066] ; Chinese Natural Science Foundation[10903026] ; West Light Foundation of the Chinese Academy of Sciences
Funding OrganizationChinese Natural Science Foundation[11103074, 11133007, 10973037, 11203066, 10903026] ; West Light Foundation of the Chinese Academy of Sciences
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
PublisherELSEVIER SCIENCE BV
Publication PlacePO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN1384-1076
URL查看原文
Archive Date2015-07-20
WOS IDWOS:000325510600014
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordVELOCITY CURVES ; VARIABLE-STARS ; LIGHT
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/5910
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 AuthorLiu L(刘亮)
Affiliation1.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
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu L,Qian SB,Lajus, EF. 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.(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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