Yukawa Black Holes from Interacting Vacuum

Understand

In this paper we obtain an exact solution of Einstein field equations assuming an interaction between a vacuum component and the Maxwell field.

• The key feature of such interaction refers to a simple stress exchange so that the electromagnetic field naturally incorporates the Yukawa potential.
• It is shown that the resulting spacetime thus obtained can either be a naked singularity or a black hole with an inner Cauchy horizon $R_-$ and an exterior event horizon $R_+$.
• For this latter configuration we examine the group velocity of test photons in the region $R>R_+$.