Update of membership and mean proper motion of open clusters from UCAC5 catalog

TL;DR

This paper updates the mean proper motions and membership probabilities for 1108 open clusters using improved UCAC5 data within the GAIA reference frame, providing the most comprehensive proper motion catalog to date.

Contribution

It presents the first proper motion measurements for five clusters and significantly increases the number of identified members for the entire sample, updating the open cluster catalog.

Findings

Mean proper motions for 1108 clusters provided.

First proper motion data for five clusters.

Enhanced membership determination with more identified stars.

Abstract

We present mean proper motions and membership probabilities of individual stars for optically visible open clusters, which have been determined using data from the UCAC5 catalog. This follows our previous studies with the UCAC2 and UCAC4 catalogs, but now using improved proper motions in the GAIA reference frame. In the present study results were obtained for a sample of 1108 open clusters. For five clusters, this is the first determination of mean proper motion, and for the whole sample, we present results with a much larger number of identified astrometric member stars than on previous studies. It is the last update of our Open cluster Catalog based on proper motion data only. Future updates will count on astrometric, photometric and spectroscopic GAIA data as input for analyses.