NAOC Open IR  > 光学天文研究部
Discovery of Extended Main-sequence Turnoffs in Four Young Massive Clusters in the Magellanic Clouds
Li, Chengyuan1; de Grijs, Richard2,3,4; Deng, Licai5; Milone, Antonino P.6
2017-08-01
发表期刊ASTROPHYSICAL JOURNAL
卷号844期号:2
摘要An increasing number of young massive clusters (YMCs) in the Magellanic Clouds have been found to exhibit bimodal or extended main sequences (MSs) in their color-magnitude diagrams (CMDs). These features are usually interpreted in terms of a coeval stellar population with different stellar rotational rates, where the blue and red MS stars are populated by non- (or slowly) and rapidly rotating stellar populations, respectively. However, some studies have shown that an age spread of several million years is required to reproduce the observed wide turnoff regions in some YMCs. Here we present the ultraviolet-visual CMDs of four Large and Small Magellanic Cloud YMCs, NGC 330, NGC 1805, NGC 1818, and NGC 2164, based on high-precision Hubble Space Telescope photometry. We show that they all exhibit extended main-sequence turnoffs (MSTOs). The importance of age spreads and stellar rotation in reproducing the observations is investigated. The observed extended MSTOs cannot be explained by stellar rotation alone. Adopting an age spread of 35-50 Myr can alleviate this difficulty. We conclude that stars in these clusters are characterized by ranges in both their ages and rotation properties, but the origin of the age spread in these clusters remains unknown.
文章类型Article
关键词Hertzsprung-russell And C-m Diagrams Globular Clusters: Individual (Ngc 330 Magellanic Clouds Ngc 1805 Ngc 1818 Ngc 2164)
WOS标题词Science & Technology ; Physical Sciences
资助者Macquarie Research Fellowship Scheme ; Macquarie Research Fellowship Scheme ; National Natural Science Foundation of China(U1631102 ; National Natural Science Foundation of China(U1631102 ; Australian Research Council through a Discovery Early Career Researcher Award(DE150101816) ; Australian Research Council through a Discovery Early Career Researcher Award(DE150101816) ; 11373010 ; 11373010 ; 11633005) ; 11633005) ; Macquarie Research Fellowship Scheme ; Macquarie Research Fellowship Scheme ; National Natural Science Foundation of China(U1631102 ; National Natural Science Foundation of China(U1631102 ; Australian Research Council through a Discovery Early Career Researcher Award(DE150101816) ; Australian Research Council through a Discovery Early Career Researcher Award(DE150101816) ; 11373010 ; 11373010 ; 11633005) ; 11633005)
DOI10.3847/1538-4357/aa7b36
关键词[WOS]MULTIPLE STELLAR POPULATIONS ; AGE STAR-CLUSTERS ; DISTANCES PUBLICATION BIAS ; BLUE STRAGGLER STARS ; GLOBULAR-CLUSTERS ; ASTROPHYSICS MESA ; RED CLUMP ; DYNAMICAL MODELS ; NGC 1856 ; ROTATION
收录类别SCI
语种英语
资助者Macquarie Research Fellowship Scheme ; Macquarie Research Fellowship Scheme ; National Natural Science Foundation of China(U1631102 ; National Natural Science Foundation of China(U1631102 ; Australian Research Council through a Discovery Early Career Researcher Award(DE150101816) ; Australian Research Council through a Discovery Early Career Researcher Award(DE150101816) ; 11373010 ; 11373010 ; 11633005) ; 11633005) ; Macquarie Research Fellowship Scheme ; Macquarie Research Fellowship Scheme ; National Natural Science Foundation of China(U1631102 ; National Natural Science Foundation of China(U1631102 ; Australian Research Council through a Discovery Early Career Researcher Award(DE150101816) ; Australian Research Council through a Discovery Early Career Researcher Award(DE150101816) ; 11373010 ; 11373010 ; 11633005) ; 11633005)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000406476400008
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/20069
专题光学天文研究部
作者单位1.Macquarie Univ, Dept Phys & Astron, Sydney, NSW 2109, Australia
2.Peking Univ, Kavli Inst Astron & Astrophys, Yi He Yuan Lu 5, Beijing 100871, Peoples R China
3.Peking Univ, Dept Astron, Yi He Yuan Lu 5, Beijing 100871, Peoples R China
4.Int Space Sci Inst Beijing, 1 Nanertiao, Beijing 100190, Peoples R China
5.Chinese Acad Sci, Key Lab Opt Astron, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
6.Australian Natl Univ, Mt Stromlo Observ, Res Sch Astron & Astrophys, Cotter Rd, Weston, ACT 2611, Australia
推荐引用方式
GB/T 7714
Li, Chengyuan,de Grijs, Richard,Deng, Licai,et al. Discovery of Extended Main-sequence Turnoffs in Four Young Massive Clusters in the Magellanic Clouds[J]. ASTROPHYSICAL JOURNAL,2017,844(2).
APA Li, Chengyuan,de Grijs, Richard,Deng, Licai,&Milone, Antonino P..(2017).Discovery of Extended Main-sequence Turnoffs in Four Young Massive Clusters in the Magellanic Clouds.ASTROPHYSICAL JOURNAL,844(2).
MLA Li, Chengyuan,et al."Discovery of Extended Main-sequence Turnoffs in Four Young Massive Clusters in the Magellanic Clouds".ASTROPHYSICAL JOURNAL 844.2(2017).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Li, Chengyuan]的文章
[de Grijs, Richard]的文章
[Deng, Licai]的文章
百度学术
百度学术中相似的文章
[Li, Chengyuan]的文章
[de Grijs, Richard]的文章
[Deng, Licai]的文章
必应学术
必应学术中相似的文章
[Li, Chengyuan]的文章
[de Grijs, Richard]的文章
[Deng, Licai]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。