Fig. 15
Left panel: 3D plot of the distance to the Galactic plane, in the z-axis, shown as a function of [M/H] and [α/Fe] for the analysed stars (sub-sample e of Fig. 12). Right panel: distribution of the distances to the Galactic plane in [α/Fe] vs. [M/H]. The red line shows the separation between the thick and the thin disc sequences defined in Sect. 4. In this panel, high-Z values are coded in darker grey than lower Z values.
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