Upper panel: [OI]_63μm spectrum from the central position of the map compared with other molecular and atomic features. Lower panel: line ratio of CO(6–5) (black), CO(16–15) (red), [CII] (green), H₂O 2₂₁−2₁₂ (blue), and the OH triplet at 1834 GHz (violet) to [OI]_63μm. The dashed vertical lines show the velocities –2 km s^-1 and +35 km s^-1 inside which the ratio is not computed.