Generating a unified catalogue of open clusters and their most probable members

Abstract

In this work we present the largest database of open clusters catalogued to date. To obtain it we combine almost a dozen existing databases of open clusters to generate a cross-matched list of more than 5000 unique objects, scattered throughout the Galaxy. In addition, we process around 2000 of these clusters with a new membership algorithm code; designed for the unsupervised assignment of membership probabilities. We use Gaia DR3 data up to a magnitude of G=19, resulting in an initial catalogue of more than 400.000 members for the 2000 processed clusters. We thus project a final catalogue of approximately 1.000.000 cluster members when all the clusters are analyzed.