MG12 - Talk detail |
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Participant |
Guariento, Daniel | |
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Institution |
Universidade de São Paulo, Instituto de FÃsica - Rua do Matão, Travessa R, 187 - São Paulo - São Paulo - Brazil | |
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Session |
Talk |
Abstract |
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COM2 |
Dark energy accretion onto black holes |
We study analytical models of dark energy accretion on late time small mass black holes. We first consider a stationary test fluid embedded on a Schwarzschild metric, following the work done by Babichev et al. We analyze the combined effect of radiation and phantom energy accretion and Hawking evaporation. Then we move to the accretion of an evolving dark fluid, coupling the Friedmann equations to the system. It is found that, for late and future epochs, accretion in a Lambda-CDM scenario tends to a model with an asymptotically constant black hole mass. We also consider the accretion of a simplified Chaplygin gas, and find that both the effects of phantom energy and quintessence can be obtained. Finally, we show the equations for a preliminary back reaction analysis considering accretion of a self-gravitating fluid. |