Left: overlay of the H₂ line (i.e. continuum subtracted) LUCI image (contours) on a map of the peak LSR velocity of the HCO⁺(1–0) line observed by Molinari et al. (2002). The artefacts due to continuum subtraction in the H₂ image have been blanked as already done in Fig. 12. The dashed lines represent the axes of Jet 1 and Jet 2, while the two black points indicate the positions of stars A1+A2 and B. Right: same as left panel, for the HCO⁺(1–0) line full width at half maximum.