Mixing of CNO-cycled matter in massive stars

@inproceedings{Przybilla2010MixingOC,
  title={Mixing of CNO-cycled matter in massive stars},
  author={N. Przybilla and M. Firnstein and M. Nieva and G. Meynet and A. M. R. O. BambergECAP and M. Garching and G. Observatory},
  year={2010}
}
Aims. We test predictions of evolution models on mixing of CNO-cycled products in massive stars from a fundamental perspective. Relative changes within the theoretical C:N:O abundance ratios and the buildup of helium are compared with observational results. Methods. A sample of well-studied Galactic massive stars is presented. High-quality optical spectra are carefully analysed using improved NLTE line-formation and comprehensive analysis strategies. The results are put in the context of the… Expand
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