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Fig. B.5
Same as Fig. A.3 for DNC(2–1). For evolved sources (HMPOs and UC HII) the acetaldehyde line is also present, as explained in Sect. 3.2: when possible, we have excluded the line from the Gaussian fit, otherwise we have fitted the two lines together and used only the DNC(2–1) to compute the column densities.
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