The Merger Rate of Black Holes in a Primordial Black Hole Cluster

Abstract

In this paper, the merger rate of black holes in a cluster of primordial black holes (PBHs) is investigated. The clusters have characteristics close to those of typical globular star clusters. A cluster that has a wide mass spectrum ranging from $10^{-2}$ to $10M_{\odot }$ (Solar mass) and contains a massive central black hole of the mass $M_{\bullet }=10^3{M}_{\odot }$ is considered. It is shown that in the process of the evolution of cluster, the merger rate changed significantly, and by now, the PBH clusters have passed the stage of active merging of the black holes inside~them.

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Cited by in corpus (7)

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• Influence of early dark matter halos on the primordial black holes merger rate
• Evolution of a black hole cluster in full general relativity
• Gravitational wave constraints on extended dark matter structures
• Hierarchical Merger of Primordial Black Holes in Dwarf Galaxies
• Dynamics and merger rate of primordial black holes in a cluster
• Gravitational Waves from Hyperbolic Encounters of Primordial Black Holes in Dwarf Galaxies