Blue Straggler Stars beyond the Milky Way. IV. Radial Distributions and Dynamical Implications
文献类型：期刊论文
| 作者 | Li,Chengyuan1,2,3; Sun,Weijia4,5; Hong,Jongsuk5; Deng,Licai6 ; Grijs,Richard de1,2,7; Sills,Alison8
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| 刊名 | The Astrophysical Journal
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| 出版日期 | 2019-01-30 |
| 卷号 | 871期号:2 |
| ISSN号 | 0004-637X |
| 关键词 | blue stragglers galaxies: star clusters: general |
| DOI | 10.3847/1538-4357/aaf9b3 |
| 英文摘要 | Abstract Blue straggler stars (BSSs) have been proposed as powerful indicators to measure the dynamical state of Galactic globular clusters (GCs). Here we examine for the first time whether this framework of BSSs as dynamical clocks, which was specifically developed for Galactic GCs, may also hold for younger GCs in the Large Magellanic Cloud (LMC). Using Hubble Space Telescope observations, we study seven LMC star clusters with ages between ～700 Myr and 7 Gyr. We confirm that our sample clusters are consistent with the empirical correlation previously derived for Galactic GCs, within a modest tolerance. We suggest that to further examine whether BSSs can measure the dynamical state of their host clusters over an extended range of dynamical ages, more studies of dynamically older Magellanic Cloud clusters are required. We discuss the physical implications of our results in terms of their central, dimensionless King potential, as well as the initial retention fraction of black holes. |
| 语种 | 英语 |
| 出版者 | The American Astronomical Society |
| WOS记录号 | IOP:0004-637X-871-2-AAF9B3 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/24993]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.Department of Physics and Astronomy, Macquarie University, Balaclava Road, Sydney, NSW 2109, Australia; chengyuan.li@mq.edu.au 2.Research Centre for Astronomy, Astrophysics and Astrophotonics, Macquarie University, Balaclava Road, Sydney, NSW 2109, Australia 3.Department of Astronomy, China West Normal University, Nanchong 637002, People's Republic of China 4.Department of Astronomy, Peking University, Yi He Yuan Lu 5, Hai Dian District, Beijing 100871, People's Republic of China 5.Kavli Institute for Astronomy and Astrophysics, Peking University, Yi He Yuan Lu 5, Hai Dian District, Beijing 100871, People's Republic of China 6.Key Laboratory for Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Beijing 100012, People's Republic of China 7.International Space Science Institute—Beijing, 1 Nanertiao, Zhongguancun, Hai Dian District, Beijing 100190, People's Republic of China 8.Department of Physics and Astronomy, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4M1, Canada |
| 推荐引用方式 GB/T 7714 | Li,Chengyuan,Sun,Weijia,Hong,Jongsuk,et al. Blue Straggler Stars beyond the Milky Way. IV. Radial Distributions and Dynamical Implications[J]. The Astrophysical Journal,2019,871(2). |
| APA | Li,Chengyuan,Sun,Weijia,Hong,Jongsuk,Deng,Licai,Grijs,Richard de,&Sills,Alison.(2019).Blue Straggler Stars beyond the Milky Way. IV. Radial Distributions and Dynamical Implications.The Astrophysical Journal,871(2). |
| MLA | Li,Chengyuan,et al."Blue Straggler Stars beyond the Milky Way. IV. Radial Distributions and Dynamical Implications".The Astrophysical Journal 871.2(2019). |
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来源：国家天文台
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