Abstract Details
| Name: UJJWAL KRISHNAN Affiliation: Christ (Deemed to be University), Bengaluru Conference ID: ASI2019_440 Title : Assessing the membership probability of moving group candidates from Gaia DR2 data Authors and Co-Authors : Ujjwal Krishnan, Sreeja S. Kartha, Anjusha Balan, Blesson Mathew, Raksha S Abstract Type : Poster Abstract Category : Stars, ISM and Galaxy Abstract : Moving groups are incredibly sparse and loosly bound groups of stars spread over thousands of cubic parsecs in space. The study of stars in nearby young moving groups has attracted lot of interest since they are prime laboratories to understand star formation and cluster dispersion mechanisms. In this study, we analyzed the sample of well studied moving group members using the Gaia DR2 data. The error in the astrometry during pre-Gaia period was poor and hence some stars are identified to be part of two different moving groups. With precise distance and proper motion measurements listed in Gaia DR2 catalogue, it is possible to have a final say about the membership of the moving group. We propose a good box criterion for each moving group based on the calculation of UVW space velocities from proper motion and radial velocity information. From the analysis, we identified a confirmed list of members for all well-studied eight nearby moving groups. Further, the evolutionary phase of these candidates are estimated with the aid of pre-main sequence isochrone fitting. We used the dispersion in the proper motion values of stars in each moving group to identify new moving groups. |