CO(2–1) residual mean velocity field of the CND after the subtraction of projected CND rotation curve produced by García-Burillo et al. (2019). The color scale is within the range [−200, 200] km s⁻¹ relative to the mean motion of the galaxy, v_sys = 1120 km s⁻¹, which is set to 0 km s⁻¹. Blue (red) contours span from −200 (+50) to −50 (+200) km s⁻¹ with a spacing of 25 km s⁻¹ relative to v_sys. The symbols and markers are the same as in Fig. 2.