Numerical Simulations of Astrophysical Jets from Keplerian Disks. II. Episodic Outflows

We present 2.5-dimensional time-dependent simulations of the nonlinear evolution of nonrelativistic outflows from Keplerian accretion disks orbiting low-mass protostars or black holes accreting at sub-Eddington rates. The gas is ejected from the surface of the disk (which is a fixed platform in these simulations) into a cold corona in stable equilibrium. The initial magnetic field lines are taken to be uniform and parallel to the disk axis …