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Two particular EA-type binaries in the globular cluster omega Centauri

文献类型：期刊论文

作者Li K(李凯)1,2,3; Qian SB(钱声帮)1,2
刊名RESEARCH IN ASTRONOMY AND ASTROPHYSICS
出版日期2013-07
卷号13期号:7页码:827-834
关键词galaxies: globular clusters: individual (omega Centauri) stars: binaries: close stars: binaries: eclipsing stars: blue stragglers stars: individual (V211, NV358)
ISSN号1674-4527
产权排序第一完成单位
通讯作者Li, K (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
英文摘要We analyzed the B and V light curves of two EA-type binaries V211 and NV358 for the first time using the Wilson-Devinney code. Our analysis shows that V211 is a typical Algol-type binary and NV358 is a well detached binary system. As the two binaries are definite members of omega Centauri due to their proper motion, we estimated their physical parameters, obtaining M-1 = 1.13 +/- 0.03 M-circle dot, R-1 = 0.98 +/- 0.01 R-circle dot, M-2 = 0.33 +/- 0.01 M-circle dot and R-2 = 0.92 +/- 0.01 R-circle dot for V211; M-1 = 1.30 +/- 0.05 M-circle dot, R-1 = 1.03 +/- 0.01 R-circle dot, M-2 = 0.58 +/- 0.02 M-circle dot and R-2 = 0.78 +/- 0.01 R-circle dot for NV358. On the color-magnitude diagram of omega Centauri, V211 is located in the faint blue straggler region and its primary component is more massive than a star at the main-sequence turnoff. Therefore, V211 is a blue straggler and was formed by mass transfer from the secondary component to the primary. The age of NV358 is less than 1.93 Gyr, indicating that it is much younger than the first generation of stars in omega Centauri. Like NV364 in omega Centauri, NV358 should be a second-generation binary.
WOS标题词Science & Technology ; Physical Sciences
学科主题Astronomy & Astrophysics
类目[WOS]Astronomy & Astrophysics
研究领域[WOS]Astronomy & Astrophysics
关键词[WOS]BLUE STRAGGLER STARS ; AGES EXPERIMENT ; RADIAL-DISTRIBUTION ; MAIN-SEQUENCE ; VARIABLE-STARS ; LIGHT CURVES ; 47 TUC ; POPULATION ; CATALOG ; PHOTOMETRY
收录类别SCI
原文出处http://iopscience.iop.org/article/10.1088/1674-4527/13/7/006/meta
语种英语
WOS记录号WOS:000320859600006
源URL[http://ir.ynao.ac.cn/handle/114a53/5885]  
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, Kunming 650011, China
2.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, China
3.University of Chinese Academy of Sciences, Beijing 100049, China
推荐引用方式
GB/T 7714		 Li K,Qian SB. Two particular EA-type binaries in the globular cluster omega Centauri[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2013,13(7):827-834.
APA Li K,&Qian SB.(2013).Two particular EA-type binaries in the globular cluster omega Centauri.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,13(7),827-834.
MLA Li K,et al."Two particular EA-type binaries in the globular cluster omega Centauri".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 13.7(2013):827-834.

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来源：云南天文台

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