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Internal kinematics of Globular Clusters: Current state of the art, issues, and what to expect from the future

Published online by Cambridge University Press:  11 March 2020

Andrea Bellini Open the ORCID record for Andrea Bellini [Opens in a new window]
Andrea Bellini*
Affiliation:
Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD, 21218, USA email: bellini@stsci.edu
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Abstract

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The advent of the Gaia mission is bringing astrometry to a new renaissance. Although Gaia will make important breakthroughs in many different scientific areas, stars in the crowded central fields of globular clusters (GCs) and at the faint end of the color-magnitude diagram are and will be out of Gaia’s reach. The Hubble Space Telescope (HST) is an excellent astrometric tool that has allowed us to distinguish and measure positions and brightness of faint stars in pencil-beam fields down to the very center of some GCs. Gaia and HST are two wonderful, complementary tools, but are yet far from being able to offer a complete dynamical picture of GCs. There is now great prefiguration for what the next-generation telescopes will be able to do, both ground- and space-based. This document highlights strengths and weaknesses of different facilities at different spatial and spectral regimes.

Keywords

instrumentation: adaptive optics, detectors, high angular resolutiontelescopestechniques: photometricastrometrystars: kinematics, evolution, Population IIGalaxy: globular clusters: general
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. 408 - 411
Copyright
© International Astronomical Union 2020

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