Water on the Early M Supergiant Stars α Orionis and μ Cephei

  title={Water on the Early M Supergiant Stars $\alpha$ Orionis and $\mu$ Cephei},
  author={Takashi Tsuji},
  journal={The Astrophysical Journal},
  pages={801 - 807}
  • T. Tsuji
  • Published 1 August 2000
  • Physics
  • The Astrophysical Journal
We reanalyze the spectra of α Ori (M2 Iab) and μ Cep (M2 Ia) observed with the balloon-borne telescope Stratoscope II more than 35 years ago, and we confirm the presence of water in these early M supergiant stars. This identification was first proposed by the Stratoscope observers themselves (Woolf, Schwarzschild, and Rose in 1964; and Danielson, Woolf, and Gaustad in 1965), but this important discovery was overlooked for a long time without any follow-up observation. Consequently, this finding… 

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