BIPOLAR FLOWS IN THE VICINITY OF A MAGNET IZED ROTATING-DISK

Calculations of a plasma flow in the vicinity of a magnetized disk are presented. The disk was assumed to rotate around a star with a mass t hat exceeds by a factor of many the disk mass; therefore, disk's self- gravitation can be neglected. Calculations were carried out in the fra mework of a 2.5-dimensional MBD model with axial symmetry. The results obtained show that, under a strongly nonequilibrium initial state, a magnetic-field ''twist'' is formed, resulting in the motion of matter along the rotation axis. We constructed a model of jet formation from a spherical accretion onto a system consisting of a star and a magneti zed rotating circumstellar disk.