Top: median [Fe/H] abundance vs. median stellar age at z = 0. Each point in these scatter plots is a galaxy, and each panel highlights one galactic component in colour. Halo, bulge, cold disc, and warm disc are shown in blue, green, red and orange, respectively. The grey symbols in the background show the values for all components. For reference, we also show the probability distribution for each axis as a filled line plot. Middle: same as the top panels but for the [O/Fe] abundance. Bottom: median [O/Fe] abundance vs. median [Fe/H] abundance at z = 0. Each point in these scatter plots is a galaxy, and each panel highlights one galactic component in colour. Halo, bulge, cold disc, and warm disc are shown in blue, green, red and orange, respectively. The grey dots in the background show the values for all components. For reference, we also show the probability distribution for each axis as a filled line plot.