A new numerical approach to force-free electrodynamics

FEDERICO CARRASCO; OSCAR REULA

Aachen

Congreso; 16th International Conference on Hyperbolic Problems; 2016

Force-Free Electrodynamics (FFE) is a non-linear system of equations modeling the evolution of the electromagnetic field in the presence of a magnetically dominated relativistic plasma. This configuration arises on several astrophysical scenarios which represent exciting laboratories to understand physics in extreme regimes.We present in this talk a new numerical implementation of FFE around a Kerr black hole, which reproduce standard results regarding jet formation and energy extraction by means of a truly stationary electromagnetic configuration. The novelty of our approach is three-folded:i) We use the ?multi-block? technique to represent a domain with S2xR topology within a stable numerical scheme. ii) We employ as evolution equations those arising from a covariant hyperbolization of the FFE system, which we have developed using the generalized symmetric hyperbolic formalism of Geroch. iii) We implement stable and constraint-preserving boundary conditions, which represents an outer region given by a uniform magnetic field aligned/misaligned with the symmetry axis.