AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI

	AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI
	Li K(李凯)1,2,3 ; Qian SB(钱声帮)1,2,3
刊名	ASTRONOMICAL JOURNAL
	2012-12
卷号	144 期号:6 页码:161-165
关键词	binaries: close binaries: eclipsing blue stragglers globular clusters: individual (omega Centauri) stars: individual (V239)
ISSN号	0004-6256
通讯作者	Kai, 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	omega Centauri is the largest globular cluster in the Milky Way and hence contains the largest number of variable stars within a single cluster. The results of photometric solutions are presented for the EA-type binary V239 in this cluster. According to our analysis, V239 is a typical Algol-type binary. We obtain M = 1.20 +/- 0.10 M-circle dot, R = 1.21 +/- 0.03 R-circle dot, and L = 13.68 +/- 0.63 L-circle dot for the primary component. The secondary component has M = 0.07 +/- 0.02 M-circle dot, R = 0.90 +/- 0.03 R-circle dot, and L = 2.17 +/- 0.14 L-circle dot. The binary system is located in the blue straggler region on the color-magnitude diagram of omega Centauri and the mass of the primary component exceeds the mass of a turnoff star. Therefore, we think that V239 is a blue straggler and that V239 was formed by mass transfer from the present secondary component to the present primary.
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]	EXPERIMENT. VARIABLE-STARS ; MAIN-SEQUENCE ; CCD PHOTOMETRY ; BINARY-SYSTEMS ; MASS-TRANSFER ; LIGHT CURVES ; CATALOG ; ORIGIN ; FIELD ; POPULATION
收录类别	SCI
原文出处	http://iopscience.iop.org/1538-3881/144/6/161/
语种	英语
WOS记录号	WOS:000311165400004
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5859]
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, China 2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, China 3.Graduate School of the CAS, 100049 Beijing, China
推荐引用方式 GB/T 7714	Li K,Qian SB. AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI[J]. ASTRONOMICAL JOURNAL,2012,144(6):161-165.
APA	Li K,&Qian SB.(2012).AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI.ASTRONOMICAL JOURNAL,144(6),161-165.
MLA	Li K,et al."AN ECLIPSING BLUE STRAGGLER IN THE GLOBULAR CLUSTER omega CENTAURI".ASTRONOMICAL JOURNAL 144.6(2012):161-165.