the initial value of $Z$ however, a threshold is crossed and curves of a very different type ensue, the six upper jet trajectories shown in figure 1. We see the large pressure gradients associated with the distribution of matter in the background solution acting to break the fall of the incoming material, turn it back, and then accelerate it vertically through the vertical density gradients. These jet trajectories present a relatively constant thickening at the base of the jet of order $R=0.5$, which then rapidly diminishes with height to eventually yield an extremely collimated structure which rapidly narrows to below the resolution limit of the solution, notice the horizontal displacement of the vertical axis.

Note also that although the region beyond ${\cal R}=2$ lies outside the approximation of the radial solution, the qualitative form of the full solution will not deviate much from what is shown in figure 1, due to the exact character of the angular solution. The final well collimated jet ejecting material along the poles will be a generic feature.

We can also measure the velocities along the jet, which scale linearly with the value of $Q$, and are sensitive to the choice of $g_{\theta}$ and in 