Magenta stars are scaled according to the left y-axis, and are equivalent to the magenta stars in the first panel of Fig. 6. Blue dots are scaled with respect to the right y-axis and correspond to integrated intensities of the 5₋₁→4₀ − E methanol transition at 84.5 GHz over an LTE approximation (see Sect. 5.2) averaged inside a beam size aperture (16 diameter) for each of the studied regions in this work (see Table 3).