Novel stability approach of thin-shell gravastars

TL;DR

This paper introduces a comprehensive framework for analyzing the stability of spherically symmetric thin-shell gravastars, allowing for dynamic shell movement and linking stability to the matter properties in the transition layer.

Contribution

It presents a highly general and adaptable method for stability analysis of gravastars, accommodating dynamic shells and broad classes of models.

Findings

Stability is connected to the matter properties in the thin-shell transition layer.

The framework allows for fully dynamic analysis of gravastar stability.

It can be applied to a wide range of spherically symmetric gravastar models.

Abstract

We develop an extremely general and robust framework that can be adapted to wide classes of generic spherically symmetric thin-shell gravastars. The thin shell (transition layer) will be permitted to move freely in the bulk spacetimes, permitting a fully dynamic analysis. This will then allow us to perform a general stability analysis, where it is explicitly shown that stability of the gravastar is related to the properties of the matter residing in the thin-shell transition layer.