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Fig. A.3
Normalized histogram illustrating the Fe/Si ratio distributions of the three kinematically separated stellar populations. The thick disc Fe/Si distribution is bimodal and fitted by two Gaussian with a primary peak, Fe∕Si ~ 0.57 and σFe∕Si ~ 0.09 and a secondary peak, Fe∕Si ~ 0.86 with σFe∕Si ~ 0.08.
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