THE TRACE OF THE CNO CYCLE IN THE RING NEBULA NGC 6888

@article{MesaDelgado2014THETO,
  title={THE TRACE OF THE CNO CYCLE IN THE RING NEBULA NGC 6888},
  author={A. Mesa-Delgado and C. Esteban and J. Garc'ia-Rojas and J. Reyes-P'erez and C. Morisset and F. Bresolin},
  journal={The Astrophysical Journal},
  year={2014},
  volume={785},
  pages={100}
}
We present new results on the chemical composition of the Galactic ring nebula NGC 6888 surrounding the WN6(h) star WR136. The data are based on deep spectroscopical observations taken with the High Dispersion Spectrograph at the 8.2 m Subaru Telescope. The spectra cover the optical range from 3700 to 7400 A. The effect of the CNO cycle is well-identified in the abundances of He, N, and O, while elements not involved in the synthesis such as Ar, S, and Fe present values consistent with the… Expand
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