Mass Inflation in a Rotating Charged Black Hole

TL;DR

This paper investigates how mass inflation occurs near the Cauchy horizon of a rotating charged black hole, revealing inflation of mass and deflation of angular momentum, with persistent deviations from spherical symmetry.

Contribution

It introduces an axisymmetric Ori model to analyze mass inflation in slowly rotating charged black holes, highlighting the effects on mass and angular momentum.

Findings

Mass parameter inflates near the Cauchy horizon.

Angular momentum per unit mass deflates.

Deviations from spherical symmetry persist.

Abstract

The structure of the Cauchy horizon of a charged rotating black hole is analyzed under the combined effect of an ingoing and outgoing flux of gravitational waves. In particular, by means of an axisymmetric realization of the Ori model, the growth of the mass parameter near the Cauchy horizon is studied in the slow rotation approximation. It is shown that the mass-parameter inflates, while the angular momentum per unit mass deflates, but initial deviations from spherical symmetry survive.