DETECTION OF A SECOND-GENERATION BINARY IN THE GLOBULAR CLUSTER omega CENTAURI

	DETECTION OF A SECOND-GENERATION BINARY IN THE GLOBULAR CLUSTER omega CENTAURI
	Li K(李凯)1,2,3 ; Qian SB(钱声帮)1,2,3 ; Leung, KC 4
刊名	ASTROPHYSICAL JOURNAL
	2012-08-10
卷号	755 期号:1
关键词	binaries: close binaries: eclipsing globular clusters: individual (omega Centauri) stars: early-type stars: individual (NV364)
ISSN号	0004-637X
通讯作者	Li, K (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; it is composed of multiple stellar populations. Photometric solutions for the EA-type eclipsing binary NV364 in this cluster indicate that NV364 is a well-detached binary and that both of its components are early-type normal main-sequence stars. There is no evidence for mass transfer between the two components, which are at an early stage in their evolution. Using the luminosity-color relation with optical (BV) observations, we obtain the distance modulus of (m - M) = 14.05 for NV364, which confirms that it is a member of omega Centauri. The ages of the binary components and the first-generation stars in omega Centauri are about 1.19 Gyr and 16 Gyr, respectively. Thus, the binary components are much younger than the first-generation stars. There is therefore a strong basis for considering NV364 to be a second-generation binary in this globular cluster.
学科主题	Astronomy & Astrophysics
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	MAIN-SEQUENCE ; LIGHT CURVES ; CATALOG ; STARS ; EVOLUTION ; SYSTEMS ; ORIGIN ; GALAXY
收录类别	SCI
原文出处	http://iopscience.iop.org/article/10.1088/0004-637X/755/1/83/meta
语种	英语
WOS记录号	WOS:000306909500083
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/5864]
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, P.O. Box 110, 650011 Kunming, China 3.Graduate School of the CAS, Yuquan Road 19, Shijingshan Block, 100049 Beijing, China 4.Department of Physics and Astronomy, University of Nebraska, 1400 R Street Lincoln, NE 68588, USA
推荐引用方式 GB/T 7714	Li K,Qian SB,Leung, KC. DETECTION OF A SECOND-GENERATION BINARY IN THE GLOBULAR CLUSTER omega CENTAURI[J]. ASTROPHYSICAL JOURNAL,2012,755(1).
APA	Li K,Qian SB,&Leung, KC.(2012).DETECTION OF A SECOND-GENERATION BINARY IN THE GLOBULAR CLUSTER omega CENTAURI.ASTROPHYSICAL JOURNAL,755(1).
MLA	Li K,et al."DETECTION OF A SECOND-GENERATION BINARY IN THE GLOBULAR CLUSTER omega CENTAURI".ASTROPHYSICAL JOURNAL 755.1(2012).