On the oxygen abundances of M 67 stars from the turn-off point through the red-giant branch

  title={On the oxygen abundances of M 67 stars from the turn-off point through the red-giant branch},
  author={Yoichi Takeda and Satoshi Honda},
  journal={arXiv: Solar and Stellar Astrophysics},
  • Y. TakedaS. Honda
  • Published 23 December 2014
  • Physics
  • arXiv: Solar and Stellar Astrophysics
With an aim to examine whether the surface oxygen composition suffers any appreciable change due to evolution-induced mixing of nuclear-processed material in the envelope of red giants, abundance determinations for O/Fe/Ni based on the synthetic spectrum-fitting method were performed by using the moderate-dispersion spectra in the 7770-7792A region (comprising O I 7771-5, Fe I 7780, and Ni I 7788 lines) for 16 stars of the old open cluster M 67 in various evolutionary stages from the turn-off… 

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