as a function of [M/H] (left) and its normalized distribution (centre) of the AMBRE/LI stars for the working sample. The thin disc stars are plotted in blue, thick disc members in red and metal-rich α-rich stars in green. The upper envelope of both discs from Ramírez et al. (2012) are shown as dashed lines (bottom, left). We also show vs. [α/ Fe] in the right panel (Spearman’s rank correlation coefficient equal to −0.03 and −0.04 for the thin and the thick disc, respectively).
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