Frequency distribution of the 42 488 690 Gaussians, used for the modeling of the line-width distributions of the gas phases, in the component central velocity – line-width plane. Blue points mark the local maxima in the frequency distribution of the Gaussian line widths at different velocities and the magenta lines represent initial estimates of the centers of four log-normal model distributions of the Gaussian widths in different gas phases. As abscissa we have used the quantiles of the velocity distribution of the used Gaussians. The numbers mark the values of the deciles.