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Fig. 15.

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Cumulative ejected masses of [Na/Fe] and [O/Fe] for 80–500 M⊙ models calculated at 1/30th Z⊙. Observations of stars in NGC 5904 are shown as in Fig. 11, adopted from Carretta et al. (2009). The insert includes the wide range of O-enrichment ejected by the 400–500 M⊙ models during the post-MS.
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