HCN 3−2 position-velocity (pV) diagrams of the A+B combined data: Top: east-west cut along the line of nodes of the main disk rotation. Lower: north-south cut along the minor axis of the main disk rotation. Greyscale ranges from 0 to 40 mJy beam^-1, contours are 1.4 × (1, 2, 3, 4, 5, 6, 7, 8, 9, 15, 20, 25, 30) mJy beam^-1. First contour is 2σ (1″ = 870 pc). Green dashed line outline the stellar velocity curve from Davies et al. (2004).