Color-scale first moment map (intensity-weighted peak velocities) for mm1 from the line at 217.82 GHz. The blue and red solid contours present the blue- and redshifted SiO(5–4) emission integrated between [−22,−14] and [0,24] km s⁻¹, respectively. The red dashed contours show the red-shifted CO(6–5) emission from Beuther et al. (2017b). Blue-shifted CO(6–5) can not be properly imaged in that dataset, most likely because of missing short spacings. The black contours show the lower level 1.3 mm continuum data from the 4σ levels of 0.2 to 1.0 mJy beam⁻¹ in 4σ steps.