Position-velocity plot of the CO(3-2) emission (grey scale) obtained from a cut centered at the core and perpendicular to the radio axis (PA = 51°). The plot shows the large velocity width (FWZI ∼ 600 km s⁻¹) of the gas in the central regions. The contour levels are at 0.36, 0.72, and 1.08 mJy beam⁻¹. The CO(2-1) emission along the same position angle (blue contours, levels at 0.24 and 0.48 mJy beam⁻¹) shows the same broad emission in the centre, but also the overall velocity gradient in this direction.