Emission-line spectra and 2-component Gaussian fit of the various H2 transitions in regions A, B and C. The spectra were extracted from a circular aperture of 13 spaxels, centered on the broad-component H2 feature in each region. The line width and shift between the peak of the narrow and broad component were constrained in velocity to those of the strong 1−0 S(1) line. A straight line was fitted to the continuum across a wide velocity range of −1800 to +1800 km s-1 in order to handle potential features in the continuum (see, e.g., the H2 1−0S(3) transition in region B). However, a smaller velocity range is plotted in the figures to high-light the details of the fits to the emission lines. After extracting flux measurements, for visualisation purposes the spectra in the plots were normalized to the fitted continuum.
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