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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, KC4; Li, K (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, POB 110, Kunming 650011, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2012-08-10
卷号755期号:1
DOI10.1088/0004-637X/755/1/83
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Binaries: Eclipsing Globular Clusters: Individual (Omega Centauri) Stars: Early-type Stars: Individual (Nv364)
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.
项目资助者Chinese Natural Science Foundation [11133007, 10973037, 10903026, 11003040] ; West Light Foundation of the Chinese Academy of Sciences
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2012-08-06
WOS记录号WOS:000306909500083
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]MAIN-SEQUENCE ; LIGHT CURVES ; CATALOG ; STARS ; EVOLUTION ; SYSTEMS ; ORIGIN ; GALAXY
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被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5864
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Li, K (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, 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
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GB/T 7714
Li K,Qian SB,Leung, KC,et al. 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,&Li, K .(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).
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