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Fig. A.2


PACS spectral maps in the CO 18-17 line at 144 μm and the continuum emission at 145 μm in orange contours corresponding to 30%, 50%, 70%, and 90% of the peak value written in the bottom left corner of each map. Wavelengths in microns are translated to the velocity scale on the X-axis using laboratory wavelengths (see Table A.2) of the species and cover the range from –600 to 600 km s-1. The Y-axis shows fluxes in Jy normalized to the spaxel with the brightest line on the map in a range from –0.2 to 1.2.

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