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Internal kinematics of multiple stellar populations in globular clusters

Published online by Cambridge University Press:  11 March 2020

Mattia Libralato Open the ORCID record for Mattia Libralato [Opens in a new window]
Mattia Libralato*
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD21218, USA email: libra@stsci.edu
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Abstract

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Spectroscopy and photometry have revealed existence, complexity and properties of the multiple stellar populations (mPOPs) hosted in Galactic globular clusters. However, the conundrum of the formation and evolution of mPOPs is far from being completely exploited: the available pieces of information seem not enough to shed light on these topics. Astrometry, and in particular high-precision proper motions, can provide us the sought-after answers about how mPOPs formed and have evolved in these ancient stellar systems. In the following, I present a brief overview of the observational results on the internal kinematics of the mPOPs in some GCs thanks to Hubble Space Telescope high-precision proper motions.

Keywords

(Galaxy:) globular clusters: generalstars: kinematicsastrometry
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. 324 - 328
Copyright
© International Astronomical Union 2020

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