The effective temperature scale of galactic red supergiants : Cool, but not as cool as we thought

@article{Levesque2005TheET,
  title={The effective temperature scale of galactic red supergiants : Cool, but not as cool as we thought},
  author={E. Levesque and P. Massey and K. Olsen and B. Plez and E. Josselin and A. Maeder and G. Meynet},
  journal={The Astrophysical Journal},
  year={2005},
  volume={628},
  pages={973-985}
}
We use moderate-resolution optical spectrophotometry and the new MARCS stellar atmosphere models to determine the effective temperatures of 74 Galactic red supergiants (RSGs). The stars are mostly members of OB associations or clusters with known distances, allowing a critical comparison with modern stellar evolutionary tracks. We find we can achieve excellent matches between the observations and the reddened model fluxes and molecular transitions, although the atomic lines Ca I ?4226 and Ca II… Expand

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