Nitrogen line spectroscopy of O-stars - II. Surface nitrogen abundances for O-stars in the Large Magellanic Cloud

@article{Gonzalez2012NitrogenLS,
  title={Nitrogen line spectroscopy of O-stars - II. Surface nitrogen abundances for O-stars in the Large Magellanic Cloud},
  author={J. G. Rivero Gonzalez and Joachim Puls and Francisco Najarro and Ines Brott},
  journal={Astronomy and Astrophysics},
  year={2012},
  volume={537}
}
This is the second paper in a series aiming at the analysis of nitrogen abundances in O-type stars, to enable further constraints on the early evolution of massive stars. We investigate the NIV lambda4058 emission line formation, provide nitrogen abundances for a substantial O-star sample in the LMC, and compare our findings with recent predictions from stellar evolutionary models. Stellar and wind parameters are determined by line profile fitting of hydrogen, helium and nitrogen lines, based… 
Nitrogen line spectroscopy in O-stars - III. The earliest O-stars
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This work aims at advancing current tools for the quantitative optical spectroscopy of O-stars, in order to derive carbon, nitrogen and oxygen abundances using an automatized method applicable also
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Theoretically, rotation-induced chemical mixing in massive stars has far reaching evolutionary consequences, affecting the sequence of morphological phases, lifetimes, nucleosynthesis, and supernova
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