Abstract Details

Name: Geeta Rangwal
Affiliation: kumaun University
Conference ID: ASI2020_98
Title : Dynamics of open star clusters
Authors and Co-Authors : Geeta Rangwal, R. K. S. Yadav and Alok K. Durgapal
Abstract Type : Oral
Abstract Category : Stars, ISM and Galaxy
Abstract : Open star clusters contain sparsely populated, gravitationally bound stars which orbit near the Galactic plane. Due to this, these objects are constantly disturbed by tidal forces originating from Galactic disc and the molecular clouds. This disturbance along with the dynamical evolution of the clusters change the structure of open clusters. Therefore, the study of the motion of open clusters around the Galaxy is very helpful to understand the dynamics and their effect within the Galaxy. With these aims, we investigated three open clusters namely NGC 6067, NGC 2506 and IC 4651. A wide-field CCD photometric data set along with GAIA astrometric data are considered for the present analysis. Using these data sets, various properties and orbits of these clusters are studied. Present analysis shows that these three clusters are orbiting in a boxy orbit around the Galactic centre. Investigation of the orbits indicate that NGC 2506 is situated at a large Galactocentric distance as compared to IC 4651. Despite being similar ages, it is found that NGC 2506 is more compact than IC 4651.