From disk winds to relativistic jets

摘要

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 PLUTO~1 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 37 degrees and mildly relativistic velocities. The outer subrelativistic flow is a promising candidate for the Xray absorption winds that are observed in many radio-quiet active galactic nulei (AGN).