Fig. C.1

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(left) C18O(2–1) integrated intensity map from -30 km s−1 to −10 km s−1. Overplotted in black are the Herschel column density contours starting at cm−2 with increments of 2×1022 cm−2. The black crosses indicate the 4 extracted fragments from the column density map and the black rectangle indicates the region used to extract the spectra presented in Fig. 2. (right) The velocity dispersion map from fitting the Gaussian to the C18O(2–1) spectra, with overplotted in black the Herschel column density contours. The white crosses indicate the locations of the spectra presented below. (bottom) The 13CO(2–1) and C18O(2–1) spectra at the locations in the hub indicated in the velocity dispersion map. The spectra at the location of the cavities (spectra 5 & 6) show skewed spectra in both 13CO(2–1) and C18O(2–1).
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