Normalized KDE for different model parameters and molecule families defined in Sect. 4. Additionally, the bandwidth h of all KDEs used for each molecule family is given as well. The gray areas in d indicate the velocity ranges described in Table 1. The families “complex O-bearing molecules” (Sect. 4.2) and “other molecules” (Sect. 4.9) are not shown, because they contain only one molecule, respectively.