Institutional Repository of Optical Astronomy Research Laboratory
| Deciphering Star Cluster Evolution by Shape Morphology | |
Hu, Qingshun1,2 ; Zhang, Yu1,2; Esamdin, Ali1,2; Liu, Jinzhong1,2; Zeng, Xiangyun1,2
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| 2021-05-01 | |
| Source Publication | ASTROPHYSICAL JOURNAL
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| ISSN | 0004-637X |
| Volume | 912Issue:1Pages:5 |
| Contribution Rank | 1 |
| Abstract | 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. |
| DOI | 10.3847/1538-4357/abec3e |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 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 Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:000646376900001 |
| Publisher | IOP PUBLISHING LTD |
| Funding Organization | National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; 2017 Heaven Lake Hundred-Talent Program of Xinjiang Uygur Autonomous Region of China |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/4004 |
| Collection | 光学天文与技术应用研究室 |
| Corresponding Author | Zhang, Yu; Esamdin, Ali |
| Affiliation | 1.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Xinjiang, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Hu, Qingshun,Zhang, Yu,Esamdin, Ali,et al. Deciphering Star Cluster Evolution by Shape Morphology[J]. ASTROPHYSICAL JOURNAL,2021,912(1):5. |
| APA | Hu, Qingshun,Zhang, Yu,Esamdin, Ali,Liu, Jinzhong,&Zeng, Xiangyun.(2021).Deciphering Star Cluster Evolution by Shape Morphology.ASTROPHYSICAL JOURNAL,912(1),5. |
| MLA | Hu, Qingshun,et al."Deciphering Star Cluster Evolution by Shape Morphology".ASTROPHYSICAL JOURNAL 912.1(2021):5. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Hu-2021-Deciphering （5110KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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