Open clusters with proper motions fully separated from the field stars using Gaia DR2

TL;DR

This paper investigates how open star clusters can be distinctly identified from field stars using Gaia DR2 proper motion data, enhancing understanding of their properties and distribution in the Milky Way.

Contribution

It introduces a method to distinguish open clusters with fully separated proper motions from background stars using Gaia DR2 data, and analyzes their properties across galactic quadrants.

Findings

Successfully identified clusters with distinct proper motions from field stars.

Analyzed the mean parameters of separated clusters in different galactic quadrants.

Provided insights into the distribution and characteristics of open clusters in the Milky Way.

Abstract

The study of open star clusters makes us understand a lot about the composition and construction of the Milky Way Galaxy. Thanks to the Gaia DR2 database that helps us to get the genetic members of star clusters using their proper motions and parallaxes, estimating their physical properties in a very accurate way. This study aims to detect the reasons that make proper motions value of a cluster is completely separated from the background field stars and not melted in. We studied a large sample of open stellar clusters taken from Dias catalog and drawing the vector point diagrams using the astrometric data of Gaia DR2. Marking the separated clusters and melted ones and study their mean parameters in each galactic quadrant.