Position-velocity (PV) diagrams of C₂H and CH₃OH with a velocity resolution of 0.42 km s^-1. The PV cuts are shown in the respect velocity map (Fig. 10). The contour levels are from 10% to 90% from the peak emission (from left to right, 0.74, 0.69, and 0.88 Jy beam^-1, respectively) in steps of 10%. The offsets refer to the distance along the cuts from the reference position, which is, from left to right, the dust continuum peak of MM1, the cross position of pv-1 and pv-2 in Fig. 10, and the cross in the CH₃OH panel in Fig. 10, respectively. The v_LSR at –18.3 km s^-1 and the reference position are indicated by vertical and horizontal dashed lines.