Radial distribution of the torque, quantified by the fraction of the angular momentum transferred from the gas in one rotation– dL/L, estimated from the CO(3–2) deprojected map. The forces at each point of the map were computed from the I-band HST image (see text). The torque is negative inside a 0.3 kpc radius and down to the spatial resolution of the observations. Between 6 and 9′′ from the center, there is not much CO emission and the torque estimation is noisy.