Fig. 6
Distribution of [Na/Fe] abundances for the HB stars analyzed in this paper (bottom panels) and for the RGB stars of Carretta et al. (2011b) (upper panel). Grey histograms indicate the distribution of RHB (bottom-left panel) and BHB (bottom-right panel) stars. Black histograms indicate the distribution of stars with [Ba/Fe] > 0.6.
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