Water Vapor on Betelgeuse as Revealed by TEXES

  title={Water Vapor on Betelgeuse as Revealed by TEXES},
  author={N. Ryde and G. Harper and M. Richter and T. Greathouse and J. Lacy},
The outer atmosphere of the M supergiant Betelgeuse is puzzling. Published observations of different kinds have shed light on different aspects of the atmosphere, but no unified picture has emerged. They have shown, for example, evidence of a water envelope (MOLsphere) that in some studies is found to be optically thick in the mid-infrared. In this paper, we present high-resolution, mid-infrared spectra of Betelgeuse recorded with the TEXES spectrograph. The spectra clearly show absorption… Expand
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