Thin-shell wormholes from compact stellar objects

TL;DR

This paper constructs and analyzes thin-shell wormholes from compact stellar objects like neutron stars, revealing stability conditions based on the Hayward parameter and exotic matter properties.

Contribution

It introduces a new class of thin-shell wormholes from compact objects, extending the Hayward black hole model and analyzing their stability with exotic matter.

Findings

Stable solutions exist when the Hayward parameter exceeds a critical value.

No stable solutions are possible below the critical Hayward parameter.

The structures are consistent with properties of neutron stars and other compact objects.

Abstract

This paper introduces a new type of thin-shell wormhole constructed from a special class of compact stellar objects rather than black holes. The construction and concomitant investigation of the stability to linearized radial perturbations commences with an extended version of a regular Hayward black hole. Given the equation of state $\mathcal{P}=\omega\sigma$, $\omega <0$, for the exotic matter on the thin shell, it is shown that whenever the value of the Hayward parameter is below its critical value, no stable solutions can exist. If the Hayward parameter is allowed to exceed its critical value, stable solutions can be found for moderately sized thin shells. Not only are the underlying structures ordinary compact objects, rather than black holes, the results are consistent with the properties of neutron stars, as well as other compact stellar objects.