From disk winds to relativistic jets

We investigate the relativistic acceleration and collimation of a wind launched from a magnetized accretion disk corona. Time-dependent simulations of the full set of special relativistic magnetohydrodynamic (RMHD) equations are performed with the publicly available PLUTO1 code. In order to provide an injection boundary in dynamical equilibrium, Newtoninan gravity was added as a source term. The flow starts out with sub-escape velocity and we allow for sub-magnetoslow injection to consistently prescribe the mass-loading. The detailed trans-field and parallel-field force-balances are shown with highlights on the relativistic contribution due to electric fields.2 Generally we find collimated flows with mass-weighted half-opening angles of 3-7 degrees and mildly relativistic velocities. The outer subrelativistic flow is a promising candidate for the X-ray absorption winds that are observed in many radio-quiet active galactic nulei (AGN)