# MOCCA-SURVEY Database I: Dissolution of tidally filling star clusters harboring black hole subsystem

## TL;DR

This paper studies how star clusters with black hole subsystems dissolve rapidly under tidal forces, revealing a new dissolution mechanism that affects cluster longevity and evolution.

## Contribution

It introduces a novel dissolution mechanism caused by black hole subsystems in tidally filling clusters, supported by analysis of MOCCA models.

## Key findings

- Black hole subsystems can cause abrupt cluster dissolution.
- Dissolution linked to loss of dynamical equilibrium.
- Mechanism may also apply to tidally under-filling clusters.

## Abstract

We investigate the dissolution process of star clusters embedded in an external tidal field and harboring a subsystem of stellar-mass black hole. For this purpose we analyzed the MOCCA models of real star clusters contained in the Mocca Survey Database I. We showed that the presence of a stellar-mass black hole subsystem in tidally filling star cluster can lead to abrupt cluster dissolution connected with the loss of cluster dynamical equilibrium. Such cluster dissolution can be regarded as a third type of cluster dissolution mechanism. We additionally argue that such a mechanism should also work for tidally under-filling clusters with a top-heavy initial mass function.