Imprints of dark energy models on structural properties of charged gravastars in extended teleparallel gravity

TL;DR

This paper explores how dark energy models affect the structural stability and physical properties of charged gravastars within an extended teleparallel gravity framework, highlighting the prominence of phantom fields.

Contribution

It introduces a novel analysis of gravastar stability under dark energy influences using extended teleparallel gravity with conformal symmetries, including detailed physical parameter effects.

Findings

Phantom fields yield the highest stable gravastar configurations.

Dark energy models significantly influence gravastar stability and physical properties.

Physical parameters affect length, entropy, and energy of gravastars.

Abstract

A gravastar comprises three distinct sections: the interior zone, the middle shell, and its outer region. By considering a specific extended teleparallel gravity model that incorporates conformal Killing vectors and provides the field equations. We observe that the interior part exhibits a repellent force acting on the shell. This is based on the assumption that pressure is analogous to negative energy density. The middle shell consists of ultrarelativistic plasma and pressure, which is directly proportional to the matter density and counteracts the repellent force exerted by the inner zone. In the outer zone, we compute the precise solution in a vacuum and then connect these spacetimes using junction conditions to investigate stability limits. We aim to investigate the influence of dark energy models on the stable characteristics of gravastar configurations. It is worth noting that the phantom field exhibits the highest stable configurations for all physically viable selections of physical parameters. We additionally investigate the influence of physical parameters on the correct length, entropy, and energy of the gravastar.