Analytical solutions of accreting black holes immersed in a Lambda-CDM model

Details Analytical solutions of accreting black holes immersed in a Lambda-CDM model Analytical solutions of accreting black holes immersed in a Lambda-CDM model

2010-08-25

arxiv.org/abs/1008.4333v1

Physics Letters B 693(3):218-220, 2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, 1 figure, accepted for publication in Physics Letters B

Scientific paper

10.1016/j.physletb.2010.08.067

The evolution of the mass of a black hole embedded in a universe filled with dark energy and cold dark matter is calculated in a closed form within a test fluid model in a Schwarzschild metric, taking into account the cosmological evolution of both fluids. The result describes exactly how accretion asymptotically switches from the matter-dominated to the Lambda-dominated regime. For early epochs, the black hole mass increases due to dark matter accretion, and on later epochs the increase in mass stops as dark energy accretion takes over. Thus, the unphysical behaviour of previous analyses is improved in this simple exact model.

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