Velocity channel maps at different velocity bins for the warm (H₂S(1), top panels) and cold molecular (CO (2-1), bottom panels) gas components. Channel maps are in logarithmic scale and in units of MegaJansky/steradian (top panels) and Jansky/beam (bottom panel). Contours represent arbitrary flux level. Molecular gas knots in the galactic disc, discussed in Sect. 4.7, are labelled as C1, C2, and C3. North is up, east to the left.