p − v plot of the outflow tracers ¹²CO (2–1) and SiO (5–4), along a cut with PA = +58° (cf. Fig. 5a and d). The vertical line marks the V_sys. a) The ¹²CO emission is drawn with colors (color scale on top) and black contours, from 10% of the peak emission increasing by steps of 10%. A map of the SiO emission is overlaid in white contours starting from 30% of the peak emission and increasing by 20% steps. b) Close-up view of the SiO p − v plot within 6′′ from the HMC. The SiO emission is drawn with colors (color scale on top) and black contours, from 40% of the peak emission increasing by steps of 10%. The dashed line denotes the velocity trend obtained from the CH₃CN emission (Fig. 3c).