Water vapor on supergiants : The 12 μm texes spectra of μ cephei

  title={Water vapor on supergiants : The 12 $\mu$m texes spectra of $\mu$ cephei},
  author={N. Ryde and M. Richter and G. Harper and K. Eriksson and D. Lambert},
  journal={The Astrophysical Journal},
Several recent papers have argued for warm, semidetached, molecular layers surrounding red giant and supergiant stars, a concept known as a MOLsphere. Spectroscopic and interferometric analyses have often corroborated this general picture. Here we present high-resolution spectroscopic data of pure rotational lines of water vapor at 12 μm for the supergiant μ Cep. This star has often been used to test the concept of molecular layers around supergiants. Given the prediction of an isothermal… Expand

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