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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
Affiliation:
Dept. of Physics and Astronomy, National Institute of Technology, Rourkela - 769 008, India email: ranjankmr488@gmail.com
Ananta C. Pradhan
Affiliation:
Dept. of Physics and Astronomy, National Institute of Technology, Rourkela - 769 008, India email: ranjankmr488@gmail.com
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: ranjankmr488@gmail.com
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.

Type
Contributed Papers
Copyright
© International Astronomical Union 2020

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