Speaker
Description
Accretion on massive and rotating compact objects was studied using numerical simulations for many decades. In Einstein's General Relativity gravitational interactions of such objects are described by the Kerr metric. The so-called Kerr-Newman metric pose a generalization to the case of charged compact object. It describes the gravitational forces of (spherically symmetric) objects which carry electric charge.
In the light of increasing interest in astrophysical properties of charged compact objects we decided to generalize the well-known GRMHD code called KORAL to the case of Kerr-Newman metric. We not only extended already available in the code coordinate systems to the case of the charged object, but we introduced new framework which simplifies inclusion of new metrics.
During the talk we will motivate extension of accretion studies toward electrically charged objects. Preliminary results of magneto-hydrodynamical simulations in the background of Kerr-Newman metric will be presented.