(Lower left) CO(3–2) integrated intensity map overlayed with the contours of IRAC 8 μm (same as Fig. 1), together with two lines marking the two cuts, along which the p − v diagrams are shown in the upper left and lower right panel. (Upper left/lower right) The p − v diagrams of the [C ii] (color) and CO(3–2) (contour) in T_mb [K]. The contour spacing is 1 K. The position axis is horizontal in the upper left panel (cut a)) and vertical in the lower right panel (cut b)), so that the position aligns with the position of the lower left panel.