Radial cuts through the beam at distances z = 2, 5 and 10 for an opening angle of 0° (left – case C) and 10° (right – case E), both with a King atmosphere density profile. Top – density; center – curl of the velocities; bottom – axial velocity. The cuts reveal the position of the jet beam and of a layer between the jet beam and the shocked ISM. For the cylindrical case (left) the layer is near constant in the symmetry axis direction and has a width comparable to the radius of the beam. The opening angle case (right) shows a more complicated structure of this dynamically formed layer, with two peaks in the curl of the velocity.