Left: SiO(8–7) channel maps at V_sys ± 8 km s^-1 (blue and red) overlaid on top of C³⁴S(7–6) close to systemic velocity (black). Right: C³⁴S(7–6) channel maps at low blue and redshifted velocities ~ V_sys ± 0.9 km s^-1, showing a rotating wide-angle flow about the jet axis. SiO first contour at 5σ (25 mJy beam^-1 km s^-1) and steps of 25σ. C³⁴S first contours and steps correspond to 5σ (15 mJy beam^-1 km s^-1).