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An empirical clock to measure the dynamical age of star clusters

Published online by Cambridge University Press:  11 March 2020

Francesco R. Ferraro Open the ORCID record for Francesco R. Ferraro [Opens in a new window]
Francesco R. Ferraro*
Affiliation:
Dipartimento di Fisica e Astronomia, Università degli Studi di Bologna,Via Gobetti 93/2, I–40129 Bologna, Italy email: [email protected]
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Abstract

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The observational properties of a special class of stars (the so-called Blue Straggler stars - BSSs) in Globular Clusters are discussed in the framework of using this stellar population as probe of the dynamical processes occurring in high-density stellar systems. In particular, the shape of the BSS radial distribution and their level of central segregation have been found to be powerful tracers of the level of the dynamical evolution of the hosting cluster, thus allowing the definition of an empirical chronometer able to measure the dynamical age of star clusters.

Keywords

blue stragglersglobular clusterstechniques: photometric
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. 377 - 383
Copyright
© International Astronomical Union 2020

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