Top left panel: age versus [Fe/H] for different radii, resulting from our input chemical model. Top middle panel: stellar density contours of the resulting relation after fusing with dynamics, for the “solar” radius (7 < r < 9 kpc). The overlaid curves indicate the input chemistry for some of the radii shown in the left panel. The pink dashed curve plots the mean, seen to closely follow the input r0 = 8 kpc line (cyan). Top right panel: the metallicity distributions for different age bins. Bottom row: same as above, but for the [Fe/H]–[O/Fe] relation.
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