Same as Fig. 13 at a frequency of 86 GHz. In each panel the range from −1.5 × 10¹⁸ cm <x< 0 cm indicates the jet (pointing towards the observer) and the range from 0 mas <x< 1.5 × 10¹⁸ cm corresponds to the counter-jet. The panels correspond to different gradients used in the ambient medium indicated by n and m. In each panel the top half corresponds to an OP jet and the bottom half to a PM jet. The convolving beam is plotted in the bottom left corner of each panel.