Same as Fig. A.1 but for the ¹³CO J = 10–9 spectra from the observed low-, intermediate- and high-mass YSOs. In the figure with the high-mass sample, the sources are presented according to their evolutionary stage. In the first row we find the mid-IR-quiet high-mass protostellar objects (HMPOs), in the second row the mid-IR-bright HMPOs, in the third line hot molecular cores and in the last row the ultra-compact Hii regions.