Analysis of membership probability of nearby young moving groups using Gaia DR3

Past few decades have seen a remarkable rise in the study of nearby moving groups due to renowned all sky surveys using facilities such as 2MASS, WISE and Gaia. These groups of stars are said to be remnants of star clusters and are believed to have a common origin. They share a similar space motion, which is used to identify their memberships. In our study we analyse the membership probabilities of 13 such moving groups, using their astrometric data listed in Gaia DR3. We collected our initial sample from the literature, which is the best compiled list of moving group candidates available till date. The unparalleled accuracy of Gaia DR3 astrometry makes our analysis more reliable when compared to previous Gaia releases. We used Gaia DR3 photometry to estimate stellar parameters such as age of the moving group members. Interestingly, we found that age spread is significantly wide among the moving group members, in spite of their common origin. We observe the need to refined ‘good box’ criterion using UVW space velocity analysis of the moving groups