Position-velocity (pV) diagrams of CO 3–2 across the jet axis. Contour levels are 0.6 × (1,2,3,4) mJy beam⁻¹, and colour range from 0.6 to 30 mJy. The horizontal dotted line indicates the jet symmetry axis. Top left panel: cut to the north of the nucleus. The expected signature of a rotating wind is indicated with red dashed curves (see Fig. 12 and Sect. 7.1.1). Lower left panel: cut to the north of the nucleus. Top right panel: cut to the south of the nucleus. Lower right panel: cut to the north of the nucleus. The arrows point to structures that are proposed to be bow shocks (see Sect. 6.4).