2019/01/15 by D. Bossini, A. Vallenari, A. Bragaglia +9 · 2 citations
Physics and Astronomy · #Astrometry #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Cluster (spacecraft) #Computer science #Distance modulus #Gamma-ray bursts and supernovae #Open cluster #Photometry (optics) #Physics #Stars #Stellar, planetary, and galactic studies #astro-ph.GA #astro-ph.SR
paper · pdf · doi:10.1051/0004-6361/201834693
published as A&A 623, A108 (2019) · 14 pages, 11 figures. Submitted
arxiv created 2019/01/15 · openalex created_date 2019/01/25 · openalex publication_date 2019/02/08 · arxiv updated 2019/03/13 · openalex updated_date 2026/08/06
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 , G BP , G RP 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.