Identification of a deep contact binary in the field of the globular cluster 47 Tuc

	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, EF 3,4
刊名	NEW ASTRONOMY
	2014-01
卷号	26 页码:116-120
关键词	Stars: binaries: eclipsing Stars: individual (V95 47 Tuc)
ISSN号	1384-1076
通讯作者	Liu, L (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	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.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	VELOCITY CURVES ; VARIABLE-STARS ; LIGHT
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S138410761300081X
语种	英语
WOS记录号	WOS:000325510600014
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5910]
专题	云南天文台_双星与变星研究组云南天文台_中国科学院天体结构与演化重点实验室
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
推荐引用方式 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.