Comparison between moment 1 and 2 maps generated from data, ^3DBAROLO disc model and residuals. Top panels: CO(2−1) moment 1 (top left) and moment 2 (top right) maps. A threshold of 3σ has been applied. The black cross gives the AGN position. Central panels: moment 1 (centre left) and moment 2 (centre right) maps of the ^3DBAROLO disc model. The black dashed lines give the orientation of the major and minor kinematic axes (PA = 248 and 338 deg, respectively). Bottom panels: moment 1 (bottom left) and moment 2 (bottom right) maps of the residuals obtained by subtracting the model velocity and velocity dispersion maps from the observed ones. A, B, C, and D indicate the main dynamical perturbations discussed in the text.