A Monte Carlo study of early gas expulsion and evolution of star clusters: new simulations with the MOCCA code in the AMUSE framework

Abstract

We introduce a new prescription for the evolution of globular clusters (GCs) during the initial embedded gas phase into a Monte Carlo method. With a simplified version of the Monte Carlo MOCCA code embedded in the AMUSE framework, we study the survival of GCs after the removal of primordial gas. We first test our code and show that our results for the evolution of mass and Lagrangian radii are in good agreement with those obtained with N-body simulations. The Monte Carlo code enables a more rapid exploration of the evolution of systems with a larger number of stars than N-body simulations. We have carried out a new survey of simulations to explore the evolution of globular clusters with up to $N=500000$ stars for a range of different star formation efficiencies and half-mass radii. Our study shows the range of initial conditions leading to the clusters' dissolution and those for which the clusters can survive this early evolutionary phase.

13 pages, 6 figures

References in corpus (14)

• Binary interaction dominates the evolution of massive stars
• A comprehensive set of simulations studying the influence of gas expulsion on star cluster evolution
• The Dynamics of Radiation Pressure-Dominated HII Regions
• Evidence for the Strong Effect of Gas Removal on the Internal Dynamics of Young Stellar Clusters
• A multiphysics and multiscale software environment for modeling astrophysical systems
• Dependency of dynamical ejections of O stars on the masses of very young star clusters
• The bound fraction of young star clusters
• On the initial binary population for star cluster simulations
• Impact of a star formation efficiency profile on the evolution of open clusters
• Towards an N-body Model for the Globular Cluster M4
• A perfect starburst cluster made in one go: the NGC 3603 young cluster
• A new method to create initially mass segregated star clusters in virial equilibrium
• Neutron star natal kicks and the long-term survival of star clusters
• The bound mass of Dehnen models with centrally peaked star formation efficiency

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• MOCCA-Survey Database: Extra Galactic Globular Clusters. III. The population of black holes in Milky Way and Andromeda-like galaxies
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