Velocity field determined from methanol transitions at low and high energy levels. The contours indicate the continuum intensity levels from the high spatial resolution observations of Alves et al. (2019). The compact emission contours arise from the circumstellar discs around each protostar of the binary system: 11A (northern component) and 11B (southern component). The dashed line in the left panel shows the direction of the cut used to produce the position-velocity diagram displayed in Fig. 17. The cut position angle is 140° and its width is 0.5″, encompassing both protostars.