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Fig. 10


Correlations between the light elements. Top left: [Na/Fe] vs. [O/Fe], top right: [Mg/Fe] vs. [Al/Fe], bottom left: [Al/Fe] vs. [O/Fe], bottom right: [Na/Fe] vs. [Al/Fe]. The dashed line indicates the adopted cut between the pristine (black circles) and polluted (red triangles) population of stars. The red arrows indicate lower limits on the [O/Fe] abundance.

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