Unveiling the binary nature of NGC 2323
Context. As a well-known open cluster, NGC 2323 (also called M50) has been widely investigated for over a hundred years and has always been considered a classical single cluster.Aims. We studied the binary structure nature of NGC 2323 with Gaia Data Release 3 (DR3).Methods. We discovered the binary...
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| Hauptverfasser: | , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
[29 January 2025]
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| In: |
Astronomy and astrophysics
Year: 2025, Jahrgang: 693, Pages: A317-1-A317-9 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/202452962 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1051/0004-6361/202452962 Verlag, kostenfrei, Volltext: https://www.aanda.org/articles/aa/abs/2025/01/aa52962-24/aa52962-24.html 
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| Verfasserangaben: | Songmei Qin, Jing Zhong, Tong Tang, Yueyue Jiang, Long Wang, Kai Wu, Friedrich Anders, Lola Balaguer-Núñez, Guimei Liu, Chunyan Li, Jinliang Hou, Li Chen |
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| 520 | |a Context. As a well-known open cluster, NGC 2323 (also called M50) has been widely investigated for over a hundred years and has always been considered a classical single cluster.Aims. We studied the binary structure nature of NGC 2323 with Gaia Data Release 3 (DR3).Methods. We discovered the binary structure of NGC 2323 by the HDBSCAN algorithm based on the astrometric and photometric data from Gaia DR3. Then we employed the PETAR N-body code to investigate its binary structure origin.Results. We found that NGC 2323 consists of two distinct subclusters (NGC 2323-a and NGC 2323-b) that are still gravitationally bound. They have very close positions (three-dimensional Δpos = 12.3 pc, σΔpos = 3.4 pc) and similar tangential velocities (two-dimensional ΔV = 2.2 km s−1, σΔV = 0.02 km s−1). The best isochrone fitting ages of the two clusters are the same (158 Myr), further proving their possibly common origin. The numerical N-body simulation suggests that the less massive cluster is unlikely to be the cluster tidal tails created by the differential rotation of the Milky Way. | ||
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| 700 | 1 | |a Tang, Tong |e VerfasserIn |4 aut | |
| 700 | 1 | |a Jiang, Yueyue |e VerfasserIn |4 aut | |
| 700 | 1 | |a Wang, Long |e VerfasserIn |4 aut | |
| 700 | 1 | |a Wu, Kai |e VerfasserIn |0 (DE-588)1300293845 |0 (DE-627)1858050448 |4 aut | |
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| 700 | 1 | |a Liu, Guimei |e VerfasserIn |4 aut | |
| 700 | 1 | |a Li, Chunyan |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hou, Jinliang |e VerfasserIn |4 aut | |
| 700 | 1 | |a Chen, Li |e VerfasserIn |4 aut | |
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