On the source of the Kehagias-Sfetsos black hole

TL;DR

This paper investigates the source of the Kehagias-Sfetsos black hole, revealing it can be modeled by an anisotropic fluid with specific properties, and analyzes its gravitational behavior and energy characteristics.

Contribution

It provides a novel interpretation of the Kehagias-Sfetsos black hole as arising from an anisotropic fluid source satisfying energy conditions.

Findings

The source fluid has $p_{r} = - ho$ and satisfies WEC and NEC.

The gravitational field is repulsive inside the horizon and attractive outside.

The Misner-Sharp energy matches the black hole mass asymptotically.

Abstract

By assuming that the Kehagias-Sfetsos black hole is an exact solution of the standard Einstein equations, we investigate the properties of its source that generates the curvature. The anisotropic fluid has $p_{r} = - \rho$ as equation of state and fulfills the WEC and NEC. The gravitational field is repulsive inside the horizon and attractive outside, becoming of Schwarzschild type at large distances. The Misner-Sharp energy equals the black hole mass asymptotically.