CS J = 7–6 imfit data points superimposed on the CS J = 7–6 moment 1 map. Green and orange points indicate blue- and redshifted channels, respectively. The width and height of the data symbols indicate the 1σ uncertainty of the peak position calculated by imfit. Green and black contours show the CS J = 7–6 moment 0 map and 857 μm continuum emission, respectively, both spaced logarithmically between 5 and 100% of the peak emission, in 10 steps. The velocity vector (brown) and rotation axis (gray) were not fitted to the CS J = 7–6 data, but to H¹³CN J = 4–3 instead, in order for the data from the two molecule transitions to be compared in the distance-velocity plot in Fig. 8. The black dashed box indicates the region used for the imfit routine and also shows the region from which the spectra in Fig. 6 were extracted. All the data shown in this figure are from the Cycle 3 dataset.