The destiny of open cluster NGC 6530: past and future

Studying the structures of open clusters is crucial for understanding stellar evolution and galactic dynamics. Based on Gaia DR3 data, we apply the hierarchical clustering algorithm to a young open cluster NGC 6530 and group its members into 5 substructures. By linear tracing with the kinematic info...

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Bibliographic Details
Published in:arXiv.org
Main Authors: Delong Jia, Yu, Heng, Shao, Zhengyi, Lu, Li
Format: Paper
Language:English
Published: Ithaca Cornell University Library, arXiv.org 14.07.2024
Subjects:
Algorithms
Cluster analysis
Clustering
Clusters
Galactic evolution
Kinematics
Open clusters
Star clusters
Star formation
Stellar evolution
Structural analysis
ISSN:2331-8422
Online Access:Get full text
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Summary:Studying the structures of open clusters is crucial for understanding stellar evolution and galactic dynamics. Based on Gaia DR3 data, we apply the hierarchical clustering algorithm to a young open cluster NGC 6530 and group its members into 5 substructures. By linear tracing with the kinematic information of their members, we find that: Sub 1 is the core of the cluster. It is expanding slowly. Sub 2 consists of less bound members, which began escaping from the core about 0.78 Myr ago. Sub 3 is associated with a young star forming region. It will merge with the core after 0.72 Myr; Sub 4, as an outskirt group, is also moving towards the core, but won't end up falling in. While Sub 5 is composed of less-bound members with field contamination. This work reveals the complex internal structure and evolutionary trends of the cluster NGC 6530. It also shows the potential of the hierarchical clustering algorithm in star cluster structure analysis.
Bibliography:SourceType-Working Papers-1
ObjectType-Working Paper/Pre-Print-1
content type line 50
ISSN:2331-8422
DOI:10.48550/arxiv.2406.07637