Black hole solutions and thin shells in N-dimensional F(R) gravity with a conformally invariant Maxwell field

TL;DR

This paper generalizes N-dimensional black hole solutions in F(R) gravity with a conformally invariant Maxwell field, introduces a formalism for thin shells, and analyzes their stability, showing higher-dimensional extensions preserve qualitative behavior.

Contribution

It provides a new class of spherically symmetric solutions and a formalism for constructing and analyzing thin shells in N-dimensional F(R) gravity.

Findings

Stable thin shell configurations are possible under certain parameters.

Higher-dimensional solutions behave qualitatively like four-dimensional ones.

The main difference is a scale change with the number of dimensions.

Abstract

We present a generalization of the black hole solution with spherical symmetry already known in the literature for $N$-dimensional $F(R)$ gravity with a conformally invariant Maxwell field and constant scalar curvature $R$. This solution also includes a generalization of the one corresponding to general relativity as a special case. We introduce the formalism for the construction of a broad family of spherically symmetric thin shells in $F(R)$ theory. We use our generalized solution in order to provide examples of bubbles and thin layers of matter surrounding black holes. We analyze the stability of the constructions under perturbations preserving the symmetry, finding that stable configurations are possible for suitable values of the parameters. We show that the extension to higher dimensions does not alter the qualitative behavior of the thin shells found in four dimensions, with the main difference being a change of scale for the different values of $N$.