Substructure and halo population of Double Cluster h and chi Persei
文献类型：期刊论文
| 作者 | Zhong, Jing1 ; Chen, Li1,2; Kouwenhoven, M. B. N.3; Li, Lu1,2; Shao, Zhengyi1,4; Hou, Jinliang1,2
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| 刊名 | ASTRONOMY & ASTROPHYSICS
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| 出版日期 | 2019-04-03 |
| 卷号 | 624页码:8 |
| ISSN号 | 1432-0746 |
| 关键词 | galaxies: clusters: individual: NGC 869 galaxies: clusters: individual: NGC 884 stars: kinematics and dynamics methods: data analysis |
| DOI | 10.1051/0004-6361/201834334 |
| 英文摘要 | Context. Gaia DR2 provides an ideal dataset to study the stellar populations of open clusters at larger spatial scales because the cluster member stars can be well identified by their location in the multidimensional observational parameter space with high precision parameter measurements. Aims. In order to study the stellar population and possible substructures in the outskirts of Double Cluster h and chi Persei, we use Gaia DR2 data in a sky area of about 7.5 degrees in radius around the Double Cluster cores. Methods. We identified member stars using various criteria, including their kinematics (namely, proper motion), individual parallaxes, and photometric properties. A total of 2186 member stars in the parameter space were identified as members. Results. Based on the spatial distribution of the member stars, we find an extended halo structure of h and chi Persei about six to eight times larger than their core radii. We report the discovery of filamentary substructures extending to about 200 pc away from the Double Cluster. The tangential velocities of these distant substructures suggest that they are more likely to be remnants of primordial structures, instead of a tidally disrupted stream from the cluster cores. Moreover, internal kinematic analysis indicates that halo stars seem to experience a dynamic stretching in the RA direction, while the impact of the core components is relatively negligible. This work also suggests that the physical scale and internal motions of young massive star clusters may be more complex than previously thought. |
| 资助项目 | National Natural Science Foundation of China (NSFC)[U1731129] ; National Natural Science Foundation of China (NSFC)[11503066] ; National Natural Science Foundation of China (NSFC)[11373054] ; National Natural Science Foundation of China (NSFC)[11661161016] ; National Natural Science Foundation of China (NSFC)[11390373] ; National Natural Science Foundation of China (NSFC)[11333003] ; National Natural Science Foundation of China[11573004] ; Research Development Fund of Xi'an Jiaotong-Liverpool University (XJTLU)[RDF-16-01-16] |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | EDP SCIENCES S A |
| WOS记录号 | WOS:000463134400003 |
| 源URL | [http://119.78.226.72/handle/331011/31849]  |
| 专题 | 中国科学院上海天文台 |
| 通讯作者 | Zhong, Jing |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Astron Observ, Key Lab Res Galaxies & Cosmol, 80 Nandan Rd, Shanghai 200030, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Xian Jiaotong Liverpool Univ, Dept Math Sci, 111 Renai Rd,Suzhou Ind Pk, Suzhou 215123, Peoples R China 4.Shanghai Key Lab Astrophys, 100 Guilin Rd, Shanghai 200234, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhong, Jing,Chen, Li,Kouwenhoven, M. B. N.,et al. Substructure and halo population of Double Cluster h and chi Persei[J]. ASTRONOMY & ASTROPHYSICS,2019,624:8. |
| APA | Zhong, Jing,Chen, Li,Kouwenhoven, M. B. N.,Li, Lu,Shao, Zhengyi,&Hou, Jinliang.(2019).Substructure and halo population of Double Cluster h and chi Persei.ASTRONOMY & ASTROPHYSICS,624,8. |
| MLA | Zhong, Jing,et al."Substructure and halo population of Double Cluster h and chi Persei".ASTRONOMY & ASTROPHYSICS 624(2019):8. |
入库方式： OAI收割
来源：上海天文台
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