Magnetically Driven Accretion in the Kerr Metric III: Unbound Outflows

We have carried out fully relativistic numerical simulations of accretion disks in the Kerr metric. In this paper we focus on the unbound outflows that emerge self-consistently from the accretion flow. These outflows are found in the axial funnel region and consist of two components: a hot, fast, tenuous outflow in the axial funnel proper, and a colder, slower, denser jet along the funnel wall. Although a rotating black hole is not required to produce these unbound outflows, their strength is enhanced by black hole spin. The funnel-wall jet is excluded from the axial funnel due to elevated angular momentum, and is also pressureconfined by a magnetized corona. The tenuous funnel outflow accounts for a significant fraction of the energy transported to large distances in the higherspin simulations. We compare the outflows observed in our simulations with those seen in other simulations. Subject headings: Black holes magnetohydrodynamics jets stars:accretion Now at Dept. of Physics and Astronomy, University of Calgary, 2500 University Drive NW, Calgary,