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An Unexpected Detection of Bifurcated Blue Straggler Sequences in the Young Globular Cluster NGC 2173
Li, Chengyuan1,2; Deng, Licai2,3; de Grijs, Richard2,4,5; Jiang DK(姜登凯)6,7,8; Xin, Yu3
Source PublicationASTROPHYSICAL JOURNAL
2018-03-20
Volume856Issue:1
DOI10.3847/1538-4357/aaad65
Contribution Rank第6完成单位
Indexed BySCI
KeywordBlue Stragglers Galaxies: Star Clusters: Individual (Ngc 2173) Hertzsprung-russell And C-m Diagrams Magellanic Clouds Stars: Kinematics And Dynamics
Abstract

The bifurcated patterns in the color-magnitude diagrams of blue straggler stars (BSSs) have attracted significant attention. This type of special (but rare) pattern of two distinct blue straggler sequences is commonly interpreted as evidence that cluster core-collapse-driven stellar collisions are an efficient formation mechanism. Here, we report the detection of a bifurcated blue straggler distribution in a young Large Magellanic Cloud cluster, NGC 2173. Because of the cluster's low central stellar number density and its young age, dynamical analysis shows that stellar collisions alone cannot explain the observed BSSs. Therefore, binary evolution is instead the most viable explanation of the origin of these BSSs. However, the reason why binary evolution would render the color-magnitude distribution of BSSs bifurcated remains unclear.

Funding ProjectMacquarie Research Fellowship Scheme ; National Natural Science Foundation of China[11373010] ; Macquarie Research Fellowship Scheme ; National Natural Science Foundation of China[11390374] ; Macquarie Research Fellowship Scheme ; National Natural Science Foundation of China[11521303] ; Macquarie Research Fellowship Scheme ; National Natural Science Foundation of China[11573061] ; Macquarie Research Fellowship Scheme ; National Natural Science Foundation of China[11633005] ; Macquarie Research Fellowship Scheme ; National Natural Science Foundation of China[U1631102] ; Macquarie Research Fellowship Scheme ; National Natural Science Foundation of China[11661161016] ; National Key Basic Research Program of China[2014CB845700] ; National Key Research and Development Program of China[2017YFA0402702] ; Natural Science Foundation of Yunnan Province[2015FB190]
Funding OrganizationMacquarie Research Fellowship Scheme ; National Natural Science Foundation of China[11373010, 11390374, 11521303, 11573061, 11633005, U1631102, 11661161016] ; National Key Basic Research Program of China[2014CB845700] ; National Key Research and Development Program of China[2017YFA0402702] ; Natural Science Foundation of Yunnan Province[2015FB190]
Language英语
Subject Area天文学 ; 恒星与银河系
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000428455800011
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordLarge-magellanic-cloud ; Star-clusters ; Stellar Collisions ; Mass Function ; Binary ; Parameters ; Luminosity ; Evolution ; Origin ; Lmc
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12307
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 AuthorLi, Chengyuan
Affiliation1.Department of Physics and Astronomy, Macquarie University, Balaclava Road, North Ryde, NSW 2109, Australia
2.Department of Astronomy, China West Normal University, Nanchong 637002, People's Republic of China
3.School of Astronomy and Space Science, University of the Chinese Academy of Sciences, 20A Datun Road, Beijing 100012, People's Republic of China
4.Kavli Institute for Astronomy & Astrophysics and Department of Astronomy, Peking University, Yi He Yuan Lu 5, Beijing 100871, People's Republic of China
5.International Space Science Institute–Beijing, 1 Nanertiao, Zhongguancun, Beijing 100190, People's Republic of China
6.Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, People's Republic of China
7.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, People's Republic of China
8.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing 100012, People's Republic of China
Recommended Citation
GB/T 7714
Li, Chengyuan,Deng, Licai,de Grijs, Richard,et al. An Unexpected Detection of Bifurcated Blue Straggler Sequences in the Young Globular Cluster NGC 2173[J]. ASTROPHYSICAL JOURNAL,2018,856(1).
APA Li, Chengyuan,Deng, Licai,de Grijs, Richard,Jiang DK,&Xin, Yu.(2018).An Unexpected Detection of Bifurcated Blue Straggler Sequences in the Young Globular Cluster NGC 2173.ASTROPHYSICAL JOURNAL,856(1).
MLA Li, Chengyuan,et al."An Unexpected Detection of Bifurcated Blue Straggler Sequences in the Young Globular Cluster NGC 2173".ASTROPHYSICAL JOURNAL 856.1(2018).
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