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Evolution of star cluster systems in isolated galaxies: First results from direct N-body simulations

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posted on 2024-07-26, 14:17 authored by L. J. Rossi, K. Bekki, Jarrod HurleyJarrod Hurley
The evolution of star clusters is largely affected by the tidal field generated by the host galaxy. It is thus in principle expected that under the assumption of a ‘universal’ initial cluster mass function the properties of the evolved present-day mass function of star cluster systems should show a dependence on the properties of the galactic environment in which they evolve. To explore this expectation, a sophisticated model of the tidal field is required in order to study the evolution of star cluster systems in realistic galaxies. Along these lines, in this work we first describe a method developed for coupling N-body simulations of galaxies and star clusters. We then generate a data base of galaxy models along the Hubble sequence and calibrate evolutionary equations to the results of direct N-body simulations of star clusters in order to predict the clusters’ mass evolution as function of the galactic environment. We finally apply our methods to explore the properties of evolved ‘universal’ initial cluster mass functions and any dependence on the host galaxy morphology and mass distribution. The preliminary results show that an initial power-law distribution of the masses ‘universally’ evolves into a lognormal distribution, with the properties correlated with the stellar mass and stellar mass density of the host galaxy.

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ISSN

1365-2966

Journal title

Monthly Notices of the Royal Astronomical Society

Volume

462

Issue

3

Pagination

16 pp

Publisher

Oxford University Press

Copyright statement

This article has been accepted for publication in the Monthly Notices of the Royal Astronomical Society. Copyright © 2016 The authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.

Language

eng

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