Gravitational Charged Perfect Fluid Collapse in Friedmann Universe Models

TL;DR

This study investigates the gravitational collapse of a charged perfect fluid within Friedmann universe models, analyzing how electromagnetic fields influence horizon formation and testing the Cosmic Censorship Hypothesis.

Contribution

It introduces a model for charged perfect fluid collapse in Friedmann universes with a cosmological constant, considering weak electromagnetic fields and their effects on horizon formation.

Findings

Electric fields influence the area of apparent horizons.

Electromagnetic effects alter the timing of horizon formation.

Results support the validity of the Cosmic Censorship Hypothesis.

Abstract

This paper is devoted to study the gravitational charged perfect fluid collapse in the Friedmann universe models with cosmological constant. For this purpose, we assume that the electromagnetic field is so weak that it does not introduce any distortion into the geometry of the spacetime. The results obtained from the junction conditions between the Friedmann and the Reissner-Nordstr$\ddot{o}$m de-Sitter spacetimes are used to solve the field equations. Further, the singularity structure and mass effects of the collapsing system on time difference between the formation of apparent horizons and singularity have been studied. This analysis provides the validity of Cosmic Censorship Hypothesis. It is found that the electric field affects the area of apparent horizons and their time of formation.