| Issue |
A&A
Volume 672, April 2023
|
|
|---|---|---|
| Article Number | A81 | |
| Number of page(s) | 9 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361/202244998 | |
| Published online | 04 April 2023 | |
The new detection of blue straggler stars in 50 open clusters using Gaia DR3★
1
Key Laboratory for Research in Galaxies and Cosmology, Shanghai Astronomical Observatory, Chinese Academy of Sciences,
80 Nandan Road,
Shanghai
200030,
PR China
2
School of Astronomy and Space Science, University of Chinese Academy of Sciences,
No. 19A, Yuquan Road,
Beijing
100049,
PR China
e-mail: lichunyan@shao.ac.cn;chenli@shao.ac.cn
Received:
16
September
2022
Accepted:
13
January
2023
Context. The particularly abundant presence of blue straggler stars (BSS) in Galactic open clusters offers favorable conditions for detailed studies on the statistical properties and the origin of the blue straggler population. With the help of Gaia DR3, the number of identified open clusters continuously increases, and the determination of star cluster members is more reliable.
Aims. We performed a more thorough search for BSS in newly found open clusters based on Gaia data.
Methods. We implemented a uniform membership determination for over one thousand newly identified open clusters with larger sky coverage based on the astrometric and photometric data from Gaia DR3. The membership probabilities of stars were assigned by the pyUPMASK algorithm. Then we estimated the physical parameters of these clusters by isochrone fitting on their CMDs and picked out BSS in the specific region of these CMDs.
Results. We identified 138 BSS that had not been reported before in 50 open clusters.
Conclusions. Compared with recent catalogs that present more than 1500 BSS in 339 open clusters, our new catalog increased the number of BSS in Galactic open clusters by about 10%, and the number of open clusters with BSS by nearly 17%. In the future, more accurate abundance measurements are anticipated to better probe the origin of BSS in open clusters.
Key words: catalogs / blue stragglers / open clusters and associations: general
The catalogue is only available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/672/A81
© The Authors 2023
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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