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UVIT observations of UV-Bright stars in four Galactic Globular Clusters

Published online by Cambridge University Press:  11 March 2020

Ranjan Kumar Open the ORCID record for Ranjan Kumar [Opens in a new window] ,
Ananta C. Pradhan ,
M. Parthasarathy ,
Devendra K. Ojha ,
Abhisek Mohapatra  and
Jayant Murthy
Ranjan Kumar
Affiliation:
Dept. of Physics and Astronomy, National Institute of Technology, Rourkela - 769 008, India email: [email protected]
Ananta C. Pradhan
Affiliation:
Dept. of Physics and Astronomy, National Institute of Technology, Rourkela - 769 008, India email: [email protected]
M. Parthasarathy
Affiliation:
Indian Institute of Astrophysics, Bangalore - 560 034, India
Devendra K. Ojha
Affiliation:
Dept. of Astronomy and Astrophysics, Tata Institute of Fundamental Research (TIFR), Mumbai - 400 005, India
Abhisek Mohapatra
Affiliation:
Dept. of Physics and Astronomy, National Institute of Technology, Rourkela - 769 008, India email: [email protected]
Jayant Murthy
Affiliation:
Indian Institute of Astrophysics, Bangalore - 560 034, India
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Abstract

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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.

Keywords

globular clusters: individual (NGC 4147NGC 4590NGC 5053 and NGC 7492)stars: horizontal-branchtechniques: photometric
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S351: Star Clusters: From the Milky Way to the Early Universe , May 2019 , pp. 464 - 467
Copyright
© International Astronomical Union 2020

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