Kerr-Newman and Electromagnetic acceleration

TL;DR

This paper demonstrates that incorporating spin via the Kerr-Newman metric does not fundamentally alter previous conclusions about charged primordial black holes, particularly regarding Coulomb repulsion and naked singularities.

Contribution

It shows that the Kerr-Newman metric confirms earlier findings with Reissner-Nordstrom metric, indicating spin is not a crucial factor in these properties.

Findings

Kerr-Newman metric retains principal properties of charged black holes.

Coulomb repulsion dominance requires super-extremality.

Presence of naked singularities persists with spin inclusion.

Abstract

Previous discussions of charged dark matter neglected PBH spin and employed the Reissner-Nordstrom metric. In Nature we expect the PBHs to possess spin which require use of the technically more challenging Kerr-Newman metric. It is shown that the use of K-N metric retains the principal properties already obtained using the R-N metric, in particular the dominance of Coulomb repulsion requires super-extremality and the presence of naked singularities. In this sense, the spin of the PBHs is not an essential complication.