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The improvements in the precision of the published data in \textit{Gaia} EDR3 with respect to \textit{Gaia} DR2, particularly for parallaxes and proper motions, offer the opportunity to increase the number of known open clusters in the…

The astrometric satellite Gaia recently released part of its third data set, which provides a good opportunity to hunt for more open clusters in the Milky Way. In this work, we conduct a blind search for open clusters in the Galactic disk…

星系天体物理 · 物理学 2022-04-20 C. J. Hao , Y. Xu , Z. Y. Wu , Z. H. Lin , D. J. Liu , Y. J. Li

Studying open clusters (OCs) is essential for a comprehensive understanding of the structure and evolution of the Milky Way. Many previous studies have systematically searched for OCs near the solar system within 1.2 kpc or 20 degrees of…

星系天体物理 · 物理学 2023-06-14 Huanbin Chi , Feng Wang , Wenting Wang , Hui Deng , Zhongmu Li

We report 1,656 new star clusters found in the Galactic disk (|b|<20 degrees) beyond 1.2 kpc, using Gaia EDR3 data. Based on an unsupervised machine learning algorithm, DBSCAN, and followed our previous studies, we utilized a unique method…

星系天体物理 · 物理学 2022-12-28 Zhihong He , Xiaochen Liu , Yangping Luo , Kun Wang , Qingquan Jiang

Open clusters (OCs) are regarded as tracers to understand stellar evolution theory and validate stellar models. In this study, we presented a robust approach to identifying OCs. A hybrid method of pyUPMASK and RF is first used to remove…

太阳与恒星天体物理 · 物理学 2023-03-08 Huanbin Chi , Shoulin Wei , Feng Wang , Zhongmu Li

We report 541 new open cluster candidates in Gaia EDR3 through revisiting the cluster results from an earlier analysis of the Gaia DR2, which revealed nearly a thousand open cluster candidates in the solar neighborhood (mostly d < 3 kpc)…

星系天体物理 · 物理学 2022-05-18 Zhihong He , Chunyan Li , Jing Zhong , Guimei Liu , Leya Bai , Songmei Qin , Yueyue Jiang , Xi Zhang , Li Chen

Open clusters (OCs) are common in the Milky Way, but most of them remain undiscovered. There are numerous techniques (e.g., machine-learning algorithms) available for the exploration of OCs. However, each method has its limitations and…

星系天体物理 · 物理学 2024-03-28 Zhongmu Li , Caiyan Mao

Data from the Gaia satellite are revolutionising our understanding of the Milky Way. With every new data release, there is a need to update the census of open clusters. We aim to conduct a blind, all-sky search for open clusters using 729…

星系天体物理 · 物理学 2023-05-17 Emily L. Hunt , Sabine Reffert

Open clusters (OCs) in the Galaxy are excellent probes for tracing the structure and evolution of the Galactic disk. We present an updated catalog of parameters for 1,145 OCs, estimated using the Gaia DR3 data earlier listed in…

星系天体物理 · 物理学 2025-03-12 Geeta Rangwal , Aman Arya , Annapurni Subramaniam , Kulinder Pal Singh , Xiaowei Liu

The latest Gaia Data Release 3 provides an opportunity to expand the census of Galactic open clusters harboring classical Cepheid variables, thereby bolstering the cosmic distance scale. A comprehensive analysis yielded a total of 50…

太阳与恒星天体物理 · 物理学 2022-11-30 C. J. Hao , Y. Xu , Z. Y. Wu , Z. H. Lin , S. B. Bian , Y. J. Li , D. J. Liu

Although previous searches for star clusters have been very successful, many clusters are likely still omitted, especially at high Galactic latitude regions. In this work, based on the astrometry of Gaia EDR3, we searched nearby (parallax >…

星系天体物理 · 物理学 2022-08-31 Zhihong He , Kun Wang , Yangping Luo , Jing Li , Xiaochen Liu , Qingquan Jiang

A number of stellar open cluster (OC) pairs in the Milky Way occupy similar positions in the phase space (coordinates, parallax and proper motions) and therefore may constitute physically interacting systems. The characterization of such…

星系天体物理 · 物理学 2022-01-12 M. S. Angelo , J. F. C. Santos , F. F. S. Maia , W. J. B. Corradi

Open clusters are key targets for both Galaxy structure and evolution and stellar physics studies. Since \textit{Gaia} DR2 publication, the discovery of undetected clusters has proven that our samples were not complete. Our aim is to…

Context. Open clusters (OCs) are groups of stars formed from the same cloud of gas and cosmic dust. They play an important role in studies of star formation and evolution and our understanding of galaxy structure and dynamics. Aims. The…

Context. Most stars from in groups which with time disperse, building the field population of their host galaxy. In the Milky Way, open clusters have been continuously forming in the disk up to the present time, providing it with stars…

星系天体物理 · 物理学 2023-09-08 Pedro Guilherme-Garcia , Alberto Krone-Martins , André Moitinho

The high-precision {\it Gaia} data release 3 (DR3) enables the discovery of numerous open clusters in the Milky Way, providing an excellent opportunity to search for blue straggler stars in open clusters and investigate their formation and…

太阳与恒星天体物理 · 物理学 2025-11-11 Songmei Qin , Jing Zhong , Friedrich Anders , Lola Balaguer-Núñez , Chunyan Li , Yueyue Jiang , Guimei Liu , Tong Tang , Li Chen

Open clusters (OCs) are popular tracers of the structure and evolutionary history of the Galactic disk. The OC population is often considered to be complete within 1.8 kpc of the Sun. The recent Gaia Data Release 2 (DR2) allows the latter…

We systematically searched for open clusters in the solar neighborhood within 500 pc using pyUPMASK and HDBSCAN clustering algorithms based on {\it Gaia} DR3. Taking into consideration that the physical size for most open clusters is less…

太阳与恒星天体物理 · 物理学 2023-03-01 Songmei Qin , Jing Zhong , Tong Tang , Li Chen

Based on astrometric data from Gaia DR2, we employ an unsupervised machine learning method to blindly search for open star clusters in the Milky Way within the Galactic latitude range of |b| < 20 degrees. In addition to 2,080 known…

星系天体物理 · 物理学 2021-06-02 Zhi-Hong He , Ye Xu , Chao-Jie Hao , Zhen-Yu Wu , Jing-Jing Li

The publication of the Gaia Data Release 2 (Gaia DR2) opens a new era in Astronomy. It includes precise astrometric data (positions, proper motions and parallaxes) for more than $1.3$ billion sources, mostly stars. To analyse such a vast…

星系天体物理 · 物理学 2018-10-17 A. Castro-Ginard , C. Jordi , X. Luri , F. Julbe , M. Morvan , L. Balaguer-Núñez , T. Cantat-Gaudin
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