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A possible formation channel for blue hook stars in globular cluster - II. Effects of metallicity, mass ratio, tidal enhancement efficiency and helium abundance
Lei, Zhenxin1,2; Zhao, Gang2; Zeng, Aihua1; Shen, Lihua1; Lan, Zhongjian1; Jiang DK(姜登凯)3,4; Han ZW(韩占文)3,4
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
2016-12-01
Volume463Issue:4Pages:3449-3460
DOI10.1093/mnras/stw2242
Contribution Rank第4完成单位
Indexed BySCI
KeywordBinaries: General Globular Clusters: General
Abstract

Employing tidally enhanced stellar wind, we studied in binaries the effects of metallicity, mass ratio of primary to secondary, tidal enhancement efficiency and helium abundance on the formation of blue hook (BHk) stars in globular clusters (GCs). A total of 28 sets of binary models combined with different input parameters are studied. For each set of binary model, we presented a range of initial orbital periods that is needed to produce BHk stars in binaries. All the binary models could produce BHk stars within different range of initial orbital periods. We also compared our results with the observation in the T-eff-logg diagram of GC NGC 2808 and omega Cen. Most of the BHk stars in these two GCs locate well in the region predicted by our theoretical models, especially when C/N-enhanced model atmospheres are considered. We found that mass ratio of primary to secondary and tidal enhancement efficiency have little effects on the formation of BHk stars in binaries, while metallicity and helium abundance would play important roles, especially for helium abundance. Specifically, with helium abundance increasing in binary models, the space range of initial orbital periods needed to produce BHk stars becomes obviously wider, regardless of other input parameters adopted. Our results were discussed with recent observations and other theoretical models.

Funding ProjectNational Natural Science Foundation of China[11503016] ; National Natural Science Foundation of China[11390371] ; National Natural Science Foundation of China[11233004] ; National Natural Science Foundation of China[11573061] ; Youth Fund project of Hunan Provincial Education Department[15B214] ; Natural Science Foundation of China[11390374] ; Natural Science Foundation of China[11521303] ; Science and Technology Innovation Talent Programme of the Yunnan Province[2013HA005] ; Chinese Academy of Sciences[XDB09010202] ; Chinese Academy of Sciences[KJZD-EW-M06-01]
Funding OrganizationNational Natural Science Foundation of China[11503016, 11390371, 11233004, 11573061] ; Youth Fund project of Hunan Provincial Education Department[15B214] ; Natural Science Foundation of China[11390374, 11521303] ; Science and Technology Innovation Talent Programme of the Yunnan Province[2013HA005] ; Chinese Academy of Sciences[XDB09010202, KJZD-EW-M06-01]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星物理学 ; 恒星形成与演化
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherOXFORD UNIV PRESS
Publication PlaceGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
ISSN0035-8711
URL查看原文
WOS IDWOS:000393568200003
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordHORIZONTAL-BRANCH STARS ; STELLAR ASTROPHYSICS MESA ; DWARF COOLING CURVE ; NA-O ANTICORRELATION ; HOT SUBDWARF STARS ; OMEGA-CENTAURI ; MILKY-WAY ; MULTIPLE POPULATIONS ; ECLIPSING BINARIES ; EVOLUTIONARY STATUS
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Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9916
Collection大样本恒星演化研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorLei, Zhenxin; Han ZW(韩占文)
Affiliation1.Department of Science, Shaoyang University, Shaoyang 422000, China
2.Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences,Kunming 650011, China
4.4Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lei, Zhenxin,Zhao, Gang,Zeng, Aihua,et al. A possible formation channel for blue hook stars in globular cluster - II. Effects of metallicity, mass ratio, tidal enhancement efficiency and helium abundance[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,463(4):3449-3460.
APA Lei, Zhenxin.,Zhao, Gang.,Zeng, Aihua.,Shen, Lihua.,Lan, Zhongjian.,...&Han ZW.(2016).A possible formation channel for blue hook stars in globular cluster - II. Effects of metallicity, mass ratio, tidal enhancement efficiency and helium abundance.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,463(4),3449-3460.
MLA Lei, Zhenxin,et al."A possible formation channel for blue hook stars in globular cluster - II. Effects of metallicity, mass ratio, tidal enhancement efficiency and helium abundance".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 463.4(2016):3449-3460.
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