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Radial distribution of Blue Stragglers in NGC 5466 using AstroSat

Published online by Cambridge University Press:  11 March 2020

Snehalata Sahu Open the ORCID record for Snehalata Sahu [Opens in a new window]  and
Annapurni Subramaniam
Snehalata Sahu
Affiliation:
Indian Institute of Astrophysics, Koramangala II Block, Bengaluru, 560034, India Pondicherry University, R.V. Nagar, Kalapet, 605014, Puducherry, India emails: [email protected], [email protected]
Annapurni Subramaniam
Affiliation:
Indian Institute of Astrophysics, Koramangala II Block, Bengaluru, 560034, India
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Abstract

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We present the results obtained from Near-UV observations of the cluster NGC 5466 taken with UVIT onboard AstroSat to study the radial distribution of Blue Straggler Stars (BSSs), covering the cluster region up to a radius of 14'. Our study confirms that the BSSs are more centrally concentrated than Horizontal Branch (HB) stars in the cluster. We do not find a statistically significant rising trend in the radial distribution of BSSs for the outer regions, as most of the previously catalogued BSSs that are located in the cluster outskirts were found to be non-members, quasars or galaxies. This study highlights the importance of UV imaging combined with membership information to probe the radial distribution of BSSs.

Keywords

(Galaxy:) globular clusters: individual (NGC 5466)(stars:)- Blue Stragglersstars: horizontal-branchultraviolet: stars
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. 498 - 501
Copyright
© International Astronomical Union 2020

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