... stars

Based on observations made with the ESO Very Large Telescope at Paranal Observatory, Chile (Large programme "First Stars'', ID 165.N-0276(A); P.I.: R. Cayrel).

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...

CIFIST Marie Curie Excellence Team.

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... mass

These C and O abundances are for models without extra convective mixing. If such mixing is included both C and O  increase, but the C/O ratio does not change much.

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