Relativistic Fluid Accretion Around a Black Hole

Alejandro Cruz Osorio, ITP, Goethe University of Frankfurt, Germany

The Bondi-Hoyle accretion around a compact object study the possible scenario where one star or black hole is kicked in the interstellar medium. The result is a compact object moving with supersonic velocities, accreting mass from the medium. The interesting morphology is obtained when the accretion process reach to near steady state,  the shock cone formation in the downstream part of the fluid and in some cases the flip-flop instabilities of this shock cone. In this talk I will present the hydrodynamics simulation of the Bondi-Hoyle accretion around a rotating back hole using the CAFE code, and discuss bout the effects of the gradients in the density and velocity, and the presence of the stellar winds.