http://arxiv.org/abs/2202.07942
In this work, starting from the well-accepted relations in literature, we introduce a new formalism to compute the astrometric membership probabilities for sources in star clusters, and we provide an application to the case of the open cluster M 37. The novelty of our approach is a refined — and magnitude-dependent — modelling of the parallax distribution of the field stars. We employ the here-derived list of members to estimate the cluster’s mean systemic astrometric parameters, which are based on the most recent Gaia’s catalog (EDR3).
M. Griggio and L. Bedin
Thu, 17 Feb 22
21/60
Comments: 8 pages, 1 table, 7 figures (2 in low resolution). Accepted for publication in MNRAS on 2022, February 9
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