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Binary-driven stellar rotation evolution at the main-sequence turn-off in star clusters
Sun, Weijia1,2,3,4; de Grijs, Richard3,4,5; Deng, Licai2,6,7; Albrow, Michael D.8
2021-04-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume502Issue:3Pages:4350-4358
AbstractThe impact of stellar rotation on the morphology of star cluster colour-magnitude diagrams is widely acknowledged. However, the physics driving the distribution of the equatorial rotation velocities of main-sequence turn-off stars is as yet poorly understood. Using Gaia Data Release 2 photometry and new Southern African Large Telescope medium-resolution spectroscopy, we analyse the intermediate-age (similar to 1-Gyr-old) Galactic open clusters NGC 3960, NGC 6134, and IC 4756 and develop a novel method to derive their stellar rotation distributions based on SYCLIST stellar rotation models. Combined with literature data for the open clusters NGC 5822 and NGC 2818, we find a tight correlation between the number ratio of slow rotators and the clusters' binary fractions. The blue-main-sequence stars in at least two of our clusters are more centrally concentrated than their red-main-sequence counterparts. The origin of the equatorial stellar rotation distribution and its evolution remains as yet unidentified. However, the observed correlation in our open cluster sample suggests a binary-driven formation mechanism.
Keywordtechniques: spectroscopic galaxies: star clusters: general
Funding OrganizationChina Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China
DOI10.1093/mnras/stab347
WOS KeywordPOPULATIONS ; I.
Language英语
Funding ProjectChina Scholarship Council ; National Natural Science Foundation of China[11633005] ; National Natural Science Foundation of China[11473037] ; National Natural Science Foundation of China[U1631102]
Funding OrganizationChina Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000648998800085
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/77769
Collection中国科学院国家天文台
Corresponding AuthorSun, Weijia; de Grijs, Richard; Deng, Licai
Affiliation1.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Key Lab Opt Astron, 20A Datun Rd, Beijing 100012, Peoples R China
3.Macquarie Univ, Dept Phys & Astron, Balaclava Rd, Sydney, NSW 2109, Australia
4.Macquarie Univ, Ctr Astron Astrophys & Astrophoton, Balaclava Rd, Sydney, NSW 2109, Australia
5.Int Space Sci Inst Beijing, 1 Nanertiao, Beijing 100190, Peoples R China
6.Univ Chinese Acad Sci, Sch Astron & Space Sci, Huairou 101408, Peoples R China
7.China West Normal Univ, Dept Astron, Nanchong 637002, Peoples R China
8.Univ Canterbury, Sch Phys & Chem Sci, Private Bag 4800, Christchurch, New Zealand
Recommended Citation
GB/T 7714
Sun, Weijia,de Grijs, Richard,Deng, Licai,et al. Binary-driven stellar rotation evolution at the main-sequence turn-off in star clusters[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2021,502(3):4350-4358.
APA Sun, Weijia,de Grijs, Richard,Deng, Licai,&Albrow, Michael D..(2021).Binary-driven stellar rotation evolution at the main-sequence turn-off in star clusters.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,502(3),4350-4358.
MLA Sun, Weijia,et al."Binary-driven stellar rotation evolution at the main-sequence turn-off in star clusters".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 502.3(2021):4350-4358.
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