| Issue |
A&A
Volume 698, May 2025
|
|
|---|---|---|
| Article Number | A295 | |
| Number of page(s) | 11 | |
| Section | Catalogs and data | |
| DOI | https://doi.org/10.1051/0004-6361/202451807 | |
| Published online | 27 June 2025 | |
Selected open cluster sample for validating atmospheric parameters: Application to Gaia and other surveys
1
Astrophysics Division, 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
3
Institut de Ciències del Cosmos, Universitat de Barcelona (ICCUB),
Martí i Franquès 1,
08028
Barcelona,
Spain
★ Corresponding author: jzhong@shao.ac.cn
Received:
6
August
2024
Accepted:
6
May
2025
Context. Reliable stellar atmospheric parameters are essential for probing stellar structure and evolution, and for stellar population studies. However, various deviations appear in comparisons with different ground-based spectroscopic surveys.
Aims. We aim to select high-quality open cluster members and employ the atmospheric parameters provided by the theoretical isochrones of open clusters as a benchmark to assess the quality of stellar atmospheric parameters from Gaia DR3 and other ground-based spectroscopic surveys, such as LAMOST DR11, APOGEE DR17, and GALAH DR4.
Methods. We selected 130 open clusters with well-defined main sequences within 500 pc of the solar neighborhood as a benchmark sample to estimate the reference atmospheric parameters of the members from the best-fit isochrones of those clusters.
Results. By comparing the atmospheric parameters provided by different spectroscopic surveys to the theoretical parameters, we found that the atmospheric parameter deviation and the corresponding dispersions exhibit different variations. The atmospheric parameter deviations of F, G, and K-type stars are smaller than those of B, A, and M-type stars for most surveys. For most samples, the dispersion of Teff decreases as temperature decreases, whereas the dispersion of g shows the opposite trend.
Key words: surveys / stars: fundamental parameters / Hertzsprung-Russell and C-M diagrams / open clusters and associations: general
© The Authors 2025
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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