Black hole mass decreasing due to phantom energy accretion

TL;DR

It is shown that accretion of phantom energy is accompanied by the gradual decrease of the black hole mass in the phantom energy Universe approaching the Big Rip.

Abstract

Solution for a stationary spherically symmetric accretion of the relativistic perfect fluid with an equation of state $p(ρ)$ onto the Schwarzschild black hole is presented. This solution is a generalization of Michel solution and applicable to the problem of dark energy accretion. It is shown that accretion of phantom energy is accompanied with the gradual decrease of the black hole mass. Masses of all black holes tend to zero in the phantom energy universe approaching to the Big Rip.