Fig. C.2.
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[Mg/Fe] vs. [Fe/H] Tinsley diagram colour-coded by stellar age. Top panel: scatter plot for the high-resolution solar-vicinity sample of Delgado Mena et al. (2019), using the same symbols as in the original publication. Bottom panel: Median age per pixel in the [Mg/Fe] vs. [Fe/H] diagram for our 200 000 APOGEE DR17 giants. Overplotted are iso-density contours corresponding to 40, 80, and 160 stars per bin.
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