Publication details

Updated parameters of 1743 open clusters based on Gaia DR2

Authors

DIAS W. S. MONTEIRO H. MOITINHO A. LEPINE J. R. D. CARRARO G. PAUNZEN Ernst ALESSI B. VILLELA L.

Year of publication 2021
Type Article in Periodical
Magazine / Source Monthly Notices of the Royal Astronomical Society
MU Faculty or unit

Faculty of Science

Citation
Web https://doi.org/10.1093/mnras/stab770
Doi http://dx.doi.org/10.1093/mnras/stab770
Keywords Galaxy: open clusters and associations: general
Description In this study, we follow up our recent paper (Monteiro et al. 2020) and present a homogeneous sample of fundamental parameters of open clusters in our Galaxy, entirely based on Gaia DR2 data. We used published membership probability of the stars derived from Gaia DR2 data and applied our isochrone fitting code, updated as in Monteiro et al. (2020), to GBP and GRPGaia DR2 data for member stars. In doing this, we take into account the nominal errors in the data and derive distance, age, and extinction of each cluster. This work therefore provides parameters for 1743 open clusters and, as a by-product, a list of likely not physical or dubious open clusters is provided as well for future investigations. Furthermore, it was possible to estimate the mean radial velocity of 831 clusters (198 of which are new and unpublished so far), using stellar radial velocities from Gaia DR2 catalogue. By comparing the open cluster distances obtained from isochrone fitting with those obtained from a maximum likelihood estimate of individual member parallaxes, we found a systematic offset of (-0.05 ± 0.04) mas.

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