Age determination for 269 Gaia DR2 open clusters
By D. Bossini, Antonella Vallenari, A. Bragaglia, T. Cantat-Gaudin, R. Sordo, L. Balaguer-N'unez, C. Jordi, André Moitinho, C. Soubiran, L. Casamiquela and 2 more. Astronomy & Astrophysics, 2019
143 citations recorded by the source corpus.
Context. The Gaia Second Data Release provides precise astrometry and photometry for more than 1.3 billion sources. This catalog opens a new era concerning the characterization of open clusters and test stellar models, paving the way for better understanding of the disk properties. Aims. The aim of the paper is to improve the knowledge of cluster parameters, using only the unprecedented quality of the Gaia photometry and astrometry. Methods. We have made use of the membership determination based on the precise Gaia astrometry and photometry. We applied an automated Bayesian tool, BASE-9, to fit stellar isochrones on the observed G, GBP, GRP magnitudes of the high probability member stars. Results. We derive parameters such as age, distance modulus, and extinction for a sample of 269 open clusters, selecting only low reddening objects and discarding very young clusters, for which techniques other than isochrone-fitting are more suitable for estimating ages.
Subfields: Astronomy and Astrophysics, Instrumentation
View Paper: https://www.semanticscholar.org/paper/bbb9f51c33221895e8dc3e0f33c3a9f9a4d0280e
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In Astronomy and Astrophysics
- I. Minchev
- C. Chiappini
- Friedrich Anders
- Matthias Steinmetz
- R. D. de Jong
- G. Matijevič
- C. Soubiran
- B. Santiago
In Instrumentation
- I. Minchev
- C. Chiappini
- Friedrich Anders
- Matthias Steinmetz
- R. D. de Jong
- L. Girardi
- C. Soubiran
- A. Queiroz
Citations in the corpus
- Painting a portrait of the Galactic disc with its stellar clusters (2020, background): “The 269 clusters of Bossini et al. (2019) represent the bulk of this reference set, and they constitute the largest homogeneous sample of cluster ages obtained from Gaia data.”
- Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18 (2019, background): “…Gaia Collaboration 2018a; Cantat-Gaudin et al. 2018a,b,c; Castro-Ginard et al. 2018; Soubiran et al. 2018; Zari et al. 2018; Baumgardt et al. 2019; Bossini et al. 2019; de Boer et al. 2019; Meingast & Alves 2019), the Galactic star-formation history (Helmi et al. 2018; Mor et al. 2019),…”