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Fig. 17.
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[Na/Fe]−mass distribution of our samples. The orange dots represent the YAR stars; the fuchsia squares show the YAR stars with an uncertainty on [Na/Fe]< 0.06 dex; the grey dots symbolise the thick disc stars, selected to have an uncertainty on mass < 0.05 M⊙ and uncertainty on Na abundance < 0.06 dex.
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