Effects of Electromagnetic Field on Gravitational Collapse

TL;DR

This study investigates how electromagnetic fields influence the gravitational collapse of a charged perfect fluid within a cosmological constant, revealing that electromagnetic effects accelerate collapse by reducing pressure.

Contribution

It generalizes the perfect fluid collapse model to include electromagnetic fields, analyzing their impact on horizons and collapse dynamics.

Findings

Electromagnetic field reduces the pressure in the collapsing fluid.

Collapse occurs faster with electromagnetic fields compared to uncharged cases.

Results encompass and extend the perfect fluid collapse scenario.

Abstract

In this paper, the effect of electromagnetic field has been investigated on the spherically symmetric collapse with the perfect fluid in the presence of positive cosmological constant. Junction conditions between the static exterior and non-static interior spherically symmetric spacetimes are discussed. We study the apparent horizons and their physical significance. It is found that electromagnetic field reduces the bound of cosmological constant by reducing the pressure and hence collapsing process is faster as compared to the perfect fluid case. This work gives the generalization of the perfect fluid case to the charged perfect fluid. Results for the perfect fluid case are recovered.