Line widths (FWHM; left-hand side) and peak velocities (V_peak; right-hand side) as a function of upper level energies (E_u) for CH₃OH (top panels), CH₃NH₂ (middle panels), and NH₂CHO (bottom panels) and for GMC 6 (filled green circles), pSSC 5 (filled magenta pentagons), and pSSC 2 (filled orange diamonds). The vertical dashed grey lines indicate where the deviation in the RDs occurs, i.e. ∼40 K, 30 K, and 60 K for CH₃CHO, CH₃NH₂, and NH₂CHO, respectively. Only the most clear Gaussian fits have been used (see text). If a second component has been identified in the RDs, it is shown in lighter color. Mean FWHM and V_peak are indicated on the plots by horizontal dashed lines accompanied with their corresponding values.