Deciphering Star Cluster Evolution by Shape Morphology
文献类型：期刊论文
| 作者 | Hu, Qingshun1,2 ; Zhang, Yu1,2; Esamdin, Ali1,2; Liu, Jinzhong1,2; Zeng, Xiangyun1,2
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2021-05-01 |
| 卷号 | 912期号:1页码:10 |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/abec3e |
| 通讯作者 | Zhang, Yu(zhy@xao.ac.cn) |
| 英文摘要 | We analyze the morphological evolution of open clusters and provide shape parameters for 265 open clusters. The results show that the overall shape of sample clusters becomes more elliptical as they grow older, while their core remains circular or slightly trending to circular. There is a negative correlation of the ellipticities with the number of members of the sample clusters. A significant negative correlation between the overall ellipticities and masses is also detected for the sample clusters with log(age/year) >= 8, suggesting that the overall shapes of the clusters are possibly influenced by the number of members and masses, in addition to the external forces and the surrounding environment. For most young sample clusters, the radial stratification degree of the short-axis direction is greater than that of the long, implying that the radial stratification degree in the two directions within the young sample cluster may be unevenly affected by an internal evolutionary process. Older sample clusters exhibit lower stratification in the tangential direction, which possibly means those clusters may continue to survive for a long time at a low level of stratification. Our analysis shows that the overall shape of the sample clusters may be more susceptible to the influence of Galactic tides toward the Galactic center than the shear forces embedded in Galactic differential rotation. By analyzing the distribution of the ages and number of members of star clusters, we suggest that NGC 6791 may originate from superclusters. |
| 资助项目 | National Natural Science Foundation of China[U2031209] ; National Natural Science Foundation of China[U2031204] ; Youth Innovation Promotion Association CAS[2018080] ; 2017 Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | IOP PUBLISHING LTD |
| WOS记录号 | WOS:000646376900001 |
| 资助机构 | National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; 2017 Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/4003]  |
| 专题 | 新疆天文台_光学天文与技术应用研究室 |
| 通讯作者 | Zhang, Yu |
| 作者单位 | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Qingshun,Zhang, Yu,Esamdin, Ali,et al. Deciphering Star Cluster Evolution by Shape Morphology[J]. ASTROPHYSICAL JOURNAL,2021,912(1):10. |
| APA | Hu, Qingshun,Zhang, Yu,Esamdin, Ali,Liu, Jinzhong,&Zeng, Xiangyun.(2021).Deciphering Star Cluster Evolution by Shape Morphology.ASTROPHYSICAL JOURNAL,912(1),10. |
| MLA | Hu, Qingshun,et al."Deciphering Star Cluster Evolution by Shape Morphology".ASTROPHYSICAL JOURNAL 912.1(2021):10. |
入库方式： OAI收割
来源：新疆天文台
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