Merger rate of charged black holes from the two-body dynamical capture

TL;DR

This paper develops a formalism to calculate the merger rate of charged black holes, considering various types of charges, and analyzes how charge-to-mass ratios influence the merger rate in different models.

Contribution

It introduces a new formalism for estimating the merger rate of charged black holes from two-body dynamical capture, accounting for diverse charge types and their effects.

Findings

Charge-to-mass ratio affects merger rates depending on the model.

Electromagnetic and gravitational radiations are analyzed in hyperbolic orbits.

The formalism applies to electric, magnetic, and other U(1) charges.

Abstract

We consider the two-body dynamical capture of black holes carrying U(1) charge which can not only correspond to electric or magnetic charge but also have other physical interpretations such as dark or hidden charge. In the low-velocity and weak-field regime, we study gravitational and electromagnetic radiations from point masses with U(1) charges in a hyperbolic orbit, and we develop a formalism to derive the merger rate of charged black holes from the two-body dynamical capture. We apply the formalism to find the effects of the charge-to-mass ratio on the merger rate for possible different cases and discover that the effects depend on the models.