# Singularities in Reissner-Nordstr\"om black holes

## TL;DR

This paper investigates the internal structure of charged black holes formed by scalar field collapse, revealing the presence of both null and spacelike singularities through a late-time expansion analysis.

## Contribution

It provides a detailed analysis of singularity formation in Reissner-Nordström black holes using a late-time expansion method.

## Key findings

- Presence of a null singularity on the Cauchy horizon
- Existence of a central spacelike singularity
- Decaying radiation fluxes imply singularity formation

## Abstract

We study black holes produced by the collapse of a spherically symmetric charged scalar field in asymptotically flat space. We employ a late time expansion and show decaying fluxes of radiation through the event horizon imply the black hole must contain a null singularity on the Cauchy horizon and a central spacelike singularity.