Non-linear radial accretion of an ideal gas onto a spherically symmetric black hole.

We solve numerically the Einstein-Euler system of equations for a perfect fluid with an ideal gas equation of state, moving radially toward a spherically symmetric black hole. In order to do so we use the 3+1 decomposition of space-time with the ADM formulation of general relativity. In particular we study the growth of the event horizon and verify the convergence of our code. [ABSTRACT FROM AUTHOR]