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Dynamical effects on the stellar mass function of multiple stellar populations in globular clusters

Published online by Cambridge University Press:  11 March 2020

Enrico Vesperini Open the ORCID record for Enrico Vesperini [Opens in a new window] ,
Jongsuk Hong ,
Jeremy J. Webb ,
Franca D’Antona Open the ORCID record for Franca D’Antona [Opens in a new window]  and
Annibale D’Ercole
Enrico Vesperini
Affiliation:
Department of Astronomy, Indiana University, Bloomington, IN47401, USA email:evesperi@indiana.edu
Jongsuk Hong
Affiliation:
Kavli Institute for Astronomy and Astrophysics, Peking University, Yi He Yuan Lu 5, HaiDian District, Beijing100871, China
Jeremy J. Webb
Affiliation:
Department of Astronomy and Astrophysics, University of Toronto,Toronto, ON, M5S 3H4, Canada
Franca D’Antona
Affiliation:
INAF, Osservatorio Astronomico di Roma, I-00040 Monteporzio Catone, Rome, Italy
Annibale D’Ercole
Affiliation:
INAF, Osservatorio Astronomico di Bologna, I-40129 Bologna, Italy
Rights & Permissions [Opens in a new window]

Abstract

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We present a brief summary of the results of a study of the effects of dynamical evolution on the stellar mass function of multiple-population globular clusters. Theoretical studies have predicted that the process of multiple-population cluster formation results in a system in which second-generation (2G) stars are initially more centrally concentrated than first-generation (1G) stars. In the study presented here, we have explored the implications of the initial differences between the 2G and 1G structural properties for the evolution of the local (measured at different distances from a cluster center) and global mass function. We have studied both systems in which 1G and 2G stars start with the same initial mass function (IMF) and systems in which 1G and 2G stars have different IMFs. Finally we have explored the evolution of the spatial mixing and found that the multiscale nature of the clusters studied leads to a dependence of the mixing rate on the stellar mass.

Keywords

globular clusters: generalstellar dynamicsstars: luminosity functionmass function
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. 346 - 349
Copyright
© International Astronomical Union 2020

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