UVIT observations of UV-Bright stars in four Galactic Globular Clusters
Abstract
We have performed photometric analysis of four Galactic globular clusters (GGCs): NGC 4147, NGC 4590, NGC 5053 and NGC 7492 using far-UV and near-UV filters of the Ultraviolet Imaging Telescope (UVIT) on-board AstroSat. With the help of color-magnitude diagrams (CMDs), we have identified ~150 blue horizontal branch stars (BHBs), and ~40 blue straggler stars (BSS) in the four GGCs. We study the temperature and radial distribution of BHBs and BSS for the four GGCs.
- Publication:
-
Star Clusters: From the Milky Way to the Early Universe
- Pub Date:
- 2020
- DOI:
- 10.1017/S1743921319007373
- arXiv:
- arXiv:1908.02512
- Bibcode:
- 2020IAUS..351..464K
- Keywords:
-
- globular clusters: individual (NGC 4147;
- NGC 4590;
- NGC 5053 and NGC 7492);
- stars: horizontal-branch;
- techniques: photometric;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 4 pages, 2 figures