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

@article{Ryde2006WaterVO,
  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},
  year={2006},
  volume={645},
  pages={652-658}
}
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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References

SHOWING 1-10 OF 34 REFERENCES
Water Vapor on Betelgeuse as Revealed by TEXES
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.Expand
Detection of Water Vapor in the Photosphere of Arcturus
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)Expand
Study of molecular layers in the atmosphere of the supergiant star $\mu$ Cep by interferometry in the K band
Infrared interferometry of supergiant and Mira stars has recently been reinterpreted as revealing the presence of deep molecular layers. Empirical models for a photosphere surrounded by a simpleExpand
Water on the Early M Supergiant Stars α Orionis and μ Cephei
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 MExpand
Water in K and M giant stars unveiled by ISO
Based on the spectra obtained with Infrared Space Observatory, ISO, we detected the 6.3m bands of water in the late K giant Aldebaran ( Tau) and several early M giant stars (between M0 and M3.5),Expand
Amorphous alumina in the extended atmosphere of alpha Orionis
In this paper we study the extended atmosphere of the late-type supergiant alpha Orionis. Infrared spectroscopy of red supergiants reveals strong molecular bands, some of which do not originate inExpand
Molecules of Non-Photospheric Origin in Red Giants and Supergiants Revealed by the ISO SWS
Overall SEDs based on ISO SWS observations show fair agreement with photospheric model predictions for red (super)giant stars. However, some details of molecular spectra cannot be explained by aExpand
Warm water vapor envelope in the supergiants α Ori and α Her and its effects on the apparent size from the near-infrared to the mid-infrared
We present a possible interpretation for the increase of the angular diameter of the supergiants α Ori  (M 1-2 Ia-Ibe) and α Her (M 5 Ib-II) from the K band to the 11 μ m region and theExpand
The effective temperature scale of galactic red supergiants : Cool, but not as cool as we thought
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 mostlyExpand
Water Vapor in the Outer Atmospheres of Red Giants Probed by High-Resolution, Mid-Infrared Observations
Here, we report on our detection of water vapor in the mid-infrared (11-12 microns) spectrum of the Kl.5 giant Arcturus (α Boo) obtained with the high-resolution, infrared spectrograph TEXES. TheExpand
...
1
2
3
4
...