Pressure-driven Outtow and Magneto-centrifugal Wind from a Dynamo Active Disc

We present a numerical model of an accretion disc with mean-eld dynamo action that develops pressure-driven collimated outtow near the rotation axis and a centrifugally driven uncollimated wind in the outer parts. The jet is collimated and connned by the azimuthal magnetic eld that is produced by the dynamo in the disc and advected to the disc corona. The jet is hot and dense, but has low angular momentum. We also brieey discuss the possible generation of magnetic elds in a jet by the screw dynamo.