Detection of Water Vapor in the Photosphere of Arcturus

@article{Ryde2002DetectionOW,
  title={Detection of Water Vapor in the Photosphere of Arcturus},
  author={N. Ryde and D. Lambert and M. Richter and J. Lacy},
  journal={The Astrophysical Journal},
  year={2002},
  volume={580},
  pages={447-458}
}
We report detections of pure rotation lines of OH and H2O in the K1.5 III red-giant star Arcturus (α Bootis) using high-resolution, infrared spectra covering the regions 806 −822cm −1 (12.2 −12.4 µm) and 884 −923cm −1 (10.8 −11.3 µm). Arcturus is the hottest star yet to show water-vapor features in its disk-averaged spectrum. We argue that the water vapor lines originate from the photosphere, albeit in the outer layers. We are able to predict the observed strengths of OH and H2O lines… Expand

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