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RR Lyrae analysis in the Local Group globular clusters and dwarf galaxies

Published online by Cambridge University Press:  11 March 2020

Saruta Benkortem ,
Nahathai Tanakul Open the ORCID record for Nahathai Tanakul [Opens in a new window]  and
Chutipong Suwannajak
Saruta Benkortem
Affiliation:
Department of Physics, Faculty of Science, Mahidol University, 272 Rama VI Road, Ratchathewi, Bangkok10400, Thailand email: saruta.ben@student.mahidol.ac.th
Nahathai Tanakul
Affiliation:
National Astronomical Research Institute of Thailand (Public Organization), 260 Moo 4, Donkaew, Maerim, Chiangmai50180, Thailand emails: nahathai@narit.or.th, chutipong@narit.or.th
Chutipong Suwannajak
Affiliation:
National Astronomical Research Institute of Thailand (Public Organization), 260 Moo 4, Donkaew, Maerim, Chiangmai50180, Thailand emails: nahathai@narit.or.th, chutipong@narit.or.th
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Abstract

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RR Lyrae variables are powerful tools to study their host stellar populations. Globular clusters and dwarf galaxies are old and usually host this type of variables. With a growing number of low luminosity objects discovered in the halo of the Milky Way, classifying stars clusters and galaxies has become more challenging. In this study, we examine the properties of RR Lyrae stars in globular clusters and dwarf galaxies in the Local Group. We construct a catalog of RR Lyrae variables in the Local Group globular clusters and dwarf galaxies from previously published data and compare the properties of RR Lyrae variables between those two types of stellar systems. Our goal is to search for a physical difference in the properties of RR Lyrae variables in those two classes of stellar systems. We also analyze the global trend of RRLs in these systems to understand more about their formation and evolution history.

Keywords

galaxies: star clustersgalaxies: dwarfstars: variables
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. 56 - 59
Copyright
© International Astronomical Union 2020

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