Institutional Repository of Optical Astronomy Research Laboratory
| Exploration of morphological coherence in open clusters with a "core-shell" structure | |
Hu, Qingshun1; Zhang, Yu2,4 ; Qin, Songmei3,4; Zhong, Jing3,4; Chen, Li3,4; Luo, Yangping1
| |
| 2024-07-22 | |
| Source Publication | ASTRONOMY & ASTROPHYSICS
 |
| ISSN | 0004-6361 |
| Volume | 687Pages:A291 |
| Contribution Rank | 2 |
| Abstract | Context. The morphology of open clusters plays a major role in the study of their dynamic evolution. The study of their morphological coherence, namely, the three-dimensional (3D) difference between the inner and outer morphologies of open clusters, allows us to obtain a better understanding of the morphological evolution of open clusters. Aims. We aim to investigate the morphological coherence of 132 open clusters with up to 1 kpc from the Sun in the three-dimensional (3D) space within the heliocentric cartesian coordinate frame. The 132 open clusters have a 3D core-shell structure and conform to the ellipsoidal model, with all of them coming from a catalog of publicly available clusters in the literature. Methods. We employed the ellipsoid fitting method to delineate the 3D spatial structure of the sample clusters, while using the morphological dislocation (MD) defined in our previous work and the ellipticity ratio (ER) of the clusters' inner and outer structures to characterize the morphological coherence of the sample clusters. Results. The results show an inverse correlation between the ER of the sample clusters and the number of their members, indicating that sample clusters with a much more elliptical external morphology than internal shape generally tend to host a large number of members. Meanwhile, a slight shrinking of the MD of the sample clusters with their members' number may shed light on the significant role of the gravitational binding of the sample clusters in maintaining their morphological stability. Moreover, there are no correlations between the MD and ER of the sample clusters and their age. They are also not significantly correlated with the X-axis, the Y-axis, their orbital eccentricities, and the radial and vertical forces on them. However, the ER of the sample clusters displays some fluctuations in the distributions between it and the above covariates, implying that the morphologies of the sample clusters are sensitive to the external environment if sample effects are not taken into account. Finally, the analysis of the 3D spatial shapes of sample clusters with a small ER or a large ER demonstrates that the number of members lays an important foundation for forming a dense internal system for sample clusters. At the same time, the MD of the sample clusters can serve well as an indicator of their morphological stability, which is built upon a certain amount of member stars. Conclusions. We present a new insight into the morphological coherence of open clusters, attributed to the combination of their gravitational binding capacity and external environmental perturbations. |
| Keyword | open clusters and associations: general solar neighborhood Galaxy: stellar content |
| DOI | 10.1051/0004-6361/202347625 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | STAR-CLUSTERS ; MASS SEGREGATION ; DYNAMICAL EVOLUTION ; DENSITY PROFILE ; GAIA EDR3 ; PYTHON ; SHAPE ; DISSOLUTION ; MEMBERSHIP ; PARAMETERS |
| Funding Project | National Natural Science Foundation of China (NSFC)[12090040] ; National Natural Science Foundation of China (NSFC)[12090042] ; National Natural Science Foundation of China (NSFC)[12303037] ; National Natural Science Foundation of China (NSFC)[12173028] ; National Natural Science Foundation of China (NSFC)[12073060] ; Fundamental Research Funds of China West Normal University (CWNU)[493065] ; National Key R&D Program of China[2021YFA1600401] ; National Key R&D Program of China[2021YFA1600400] ; Chinese Space Station Telescope project[CMS-CSST-2021-A10] ; Sichuan Youth Science and Technology Innovation Research Team[21CXTD0038] ; Innovation Team Funds of China West Normal[KCXTD2022-6] ; China Scholarship Council program[202308510136] ; China Scholarship Council program[202304910547] ; Natural Science Foundation of Xinjiang Uygur Autonomous Region[2022D01E86] ; Chinese Academy of Sciences (CAS) Light of West China Program[2022-XBQNXZ-013] ; Youth Innovation Promotion Association CAS |
| WOS Research Area | Astronomy & Astrophysics |
| WOS Subject | Astronomy & Astrophysics |
| WOS ID | WOS:001275048500008 |
| Publisher | EDP SCIENCES S A |
| Funding Organization | National Natural Science Foundation of China (NSFC) ; Fundamental Research Funds of China West Normal University (CWNU) ; National Key R&D Program of China ; Chinese Space Station Telescope project ; Sichuan Youth Science and Technology Innovation Research Team ; Innovation Team Funds of China West Normal ; China Scholarship Council program ; Natural Science Foundation of Xinjiang Uygur Autonomous Region ; Chinese Academy of Sciences (CAS) Light of West China Program ; Youth Innovation Promotion Association CAS |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/6935 |
| Collection | 光学天文与技术应用研究室_星团与星系研究团组 |
| Corresponding Author | Hu, Qingshun |
| Affiliation | 1.China West Normal Univ, Sch Phys & Astron, 1 Shida Rd, Nanchong 637002, Peoples R China 2.Chinese Acad Sci, Xinjiang Astron Observ, 150,Sci 1 St, Urumqi 830011, Xinjiang, Peoples R China 3.Chinese Acad Sci, Key Lab Res Galaxies & Cosmol, Shanghai Astron Observ, 80 Nandan Rd, Shanghai 200030, Peoples R China 4.Univ Chinese Acad Sci, Sch Astron & Space Sci, 19A,Yuquan Rd, Beijing 100049, Peoples R China |
| Recommended Citation GB/T 7714 | Hu, Qingshun,Zhang, Yu,Qin, Songmei,et al. Exploration of morphological coherence in open clusters with a "core-shell" structure[J]. ASTRONOMY & ASTROPHYSICS,2024,687:A291. |
| APA | Hu, Qingshun,Zhang, Yu,Qin, Songmei,Zhong, Jing,Chen, Li,&Luo, Yangping.(2024).Exploration of morphological coherence in open clusters with a "core-shell" structure.ASTRONOMY & ASTROPHYSICS,687,A291. |
| MLA | Hu, Qingshun,et al."Exploration of morphological coherence in open clusters with a "core-shell" structure".ASTRONOMY & ASTROPHYSICS 687(2024):A291. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| Hu-2024-Exploration （3068KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment