Moment 1 map and PV diagram from the residual cube. Left panel: velocity map generated from the residual cube obtained subtracting the disc model from the data cube (a mask with a 2σ threshold on the residual intensity map was applied). The black contours show the CO(2−1) emission in residual intensity map at (3, 4, 5, 6, 7) × σ. The black dashed lines represent the slice adopted for the PV diagram (right panel) and comprise the two main kinematic perturbations in the residual intensity map, along PA = 330 deg. The black cross gives the AGN position. Right panel: PV diagram along PA = 330 deg (kinematic major axis). The red contours and yellow points represent the disc model of this inner region; the blue contours represent the data (contours are drawn at (2, 4, 6) × σ). A, C, and D indicate the main dynamical perturbations.