Fig. 11
Comparison of the helium (blue), carbon (red) and oxygen (green) mass fractions of DR1 with evolutionary predictions of helium-burning stars of various masses (12 M⊙ and 35 M⊙ from Brott et al. 2011, 150 M⊙ and 250 M⊙ from Langer et al. 2007). The uncertainty of the oxygen abundance is comparable to the size of the symbol and therefore not indicated.
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