CMDFs of the APOGEE RC samples. Top: low-α CMDFs calculated in the different radial bins (run0 grid). Dotted coloured curves are CMDFs with extrapolated linear parts. Dashed black curves are C([Fe/H]), convolutions of the ‘deconvolved’ CMDFs with the Gaussian kernel (Eq. (20)). The kernel dispersions σ_[Fe/H] are shown on the plot with the same colour coding. Bottom: same as the top panel, but for the high-α stars and no radial binning.