Fig. 12.
Left panel: measured position of the α-knee in five classical dSphs as a function of metallicity and absolute V magnitude. Middle panel: slope of the decrease of [X/Fe] over [Fe/H] at metallicities higher than the locus of the α-knee. Right panel: constant value of the plateau in [α/Fe] at low [Fe/H], before the onset of type Ia SNe for different α-elements in the individual systems. Symbols are the same as in Fig. 5.
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