Abstract Details

Name: Ranjan Kumar
Affiliation: National Institute of Technology, Rourkela
Conference ID: ASI2020_276
Title : Study of Galactic Globular Clusters using UVIT Observations
Authors and Co-Authors : R. Kumar, A.C. Pradhan, A. Mohapatra, M. Parthasarathy, D.K. Ojha, and J. Murthy
Abstract Type : Oral
Abstract Category : Stars, ISM and Galaxy
Abstract : We study the metal-poor, distant, four Galactic globular clusters, NGC 7492, NGC 5053, NGC 4590 and NGC 4147, of halo region of Milky Way using six filters of UVIT-AstroSat. We extracted cluster members using proper motion of GAIA counterparts of the observed sources. We have separated out various stellar populations present in all these clusters with the help of Color-magnitude diagram. We find mostly blue horizontal branch stars and blue stragglers present in Far-UV bands whereas we see the stellar populations down to main sequences branch in Near-UV filters. We derive effective temperature of BHBs and BSS of all the clusters using Kurucz stellar atmosphere model. The radial distributions of UV-bright sources in the four GCs are discussed.