Numerical Simulations of Accreting Black Holes

In order to study accretion and outflows in the supermassive black hole at the Galactic center, in BlackHoleCam we developed a Black Hole Accretion Code (BHAC).
The latter is a newly developed adaptive-mesh-refinement (AMR) multi-dimensional general relativistic magneto-hydrodynamic (GRMHD) code, which can solve the GRMHD equations on any background metric, allowing a parametrized exploration of accretion in various spacetimes (see here for details).

models_bhac
The Figure shows a high-resolution 2D GRMHD simulation of a Kerr BH obtained with the BHAC code: a magnetised torus allows the matter to accrete onto the black hole while at the same time a jet perpendicular to it forms.