Position–velocity diagrams of the H₂CS lines along the major axis (PA = 65°) of the disk-like structure (positive angular offsets denote the northeast direction, i.e., blueshifted emission, negative offsets denote the southwest direction, i.e., redshifted emission). The intensity (color) scale is normalized to the brightest line in each panel. The black contour denotes the 3σ contour. The dashed white lines give the source position and systemic velocity of 3.8 km s⁻¹ (shifted to 0 km s⁻¹). The upper level energy is denoted in the top right corner of each panel. The spectra at ~0.5′′ northeast of the source (indicated by black triangles left of the vertical axes) are superimposed on the pv diagram panels. The H₂ CS lines are identified by a vertical blue line, other lines by vertical orange lines. The white triangles in the top left panel highlight blending of the 7_0,7–6_0,6 line. For reference, bottom right panel: pv diagram for a thin-disk model with Keplerian disk and infalling rotating envelope.