Black Hole Remnant in Massive Gravity

TL;DR

This paper explores black hole solutions in massive gravity, showing that remnants formed after Hawking evaporation exist only in anti-de Sitter spacetime and could potentially serve as dark matter candidates.

Contribution

It demonstrates the existence of black hole remnants in massive gravity with degenerate fiducial metrics, specifically in anti-de Sitter spacetime, and discusses their implications for dark matter.

Findings

Black hole remnants only exist in anti-de Sitter spacetime.

Remnants could help address the black hole information paradox.

Potential relevance of remnants as dark matter candidates.

Abstract

The possibility of a nonzero graviton mass has been widely pursued in the literature. In this work we investigate a black hole solution in massive gravity with a degenerate fiducial metric often used in the literature. We find that the end state of Hawking evaporation leads to black hole remnant, which could help to ameliorate the information paradox. We prove that these remnants only exist in anti-de Sitter spacetime. Nevertheless, we speculate on their possible relevance to our Universe as dark matter candidate, in view of the possibility that our Universe could be inherently anti-de Sitter-like, with a transient accelerated expansion phase.