Black Hole Remnants and Dark Matter

TL;DR

This paper suggests that black hole remnants, prevented from complete evaporation by the generalized uncertainty principle, could serve as cold dark matter candidates, proposing an alternative cosmology with primordial remnants as the main dark matter source.

Contribution

It introduces a modified Hawking temperature based on GUP, showing black hole remnants can exist and potentially explain dark matter.

Findings

Black hole remnants may be stable and non-radiating.

Primordial black hole remnants could account for dark matter.

GUP modifies Hawking radiation predictions.

Abstract

We argue that, when the gravity effect is included, the generalized uncertainty principle (GUP) may prevent black holes from total evaporation in a similar way that the standard uncertainty principle prevents the hydrogen atom from total collapse. Specifically we invoke the GUP to obtain a modified Hawking temperature, which indicates that there should exist non-radiating remnants (BHR) of about Planck mass. BHRs are an attractive candidate for cold dark matter. We investigate an alternative cosmology in which primordial BHRs are the primary source of dark matter.