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Age determination for 269 $Gaia$ DR2 Open Clusters
- Source :
- A&A 623, A108 (2019)
- Publication Year :
- 2019
-
Abstract
- $Context$. 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 a better understanding of the disc 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 make use of the membership determination based on the precise Gaia astrometry and photometry. We apply anautomated 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.<br />Comment: 14 pages, 11 figures. Submitted
Details
- Database :
- arXiv
- Journal :
- A&A 623, A108 (2019)
- Publication Type :
- Report
- Accession number :
- edsarx.1901.04733
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1051/0004-6361/201834693