On the Structure of Black Bounces Sourced by Anisotropic Fluids

TL;DR

This paper investigates the structure of black bounce geometries sourced by anisotropic fluids, deriving analytical solutions that connect matter properties with minimal area throats, including examples like asymmetric black bounce spacetimes.

Contribution

It provides analytical expressions linking anisotropic matter sources to black bounce geometries, expanding understanding of their structure and properties.

Findings

Derived analytical solutions for black bounce geometries.

Connected matter properties with minimal area throats.

Presented examples including asymmetric black bounce spacetimes.

Abstract

The field equations of static, spherically symmetric geometries generated by anisotropic fluids is investigated with the aim of better understanding the relation between the matter and the emergence of minimal area throats, like in wormhole and black bounce scenarios. Imposing some simplifying restrictions on the matter, which amounts to considering nonlinear electromagnetic sources, we find analytical expressions that allow one to design the type of sought geometries. We illustrate our analysis with several examples, including an asymmetric, bounded black bounce spacetime which reproduces the standard Reissner-Nordstrom geometry on the outside all the way down to the throat.