# 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

@article{Ohnaka2004WarmWV,
title={Warm water vapor envelope in the supergiants $\alpha$ Ori and $\alpha$ Her and its effects on the apparent size from the near-infrared to the mid-infrared},
author={K. Ohnaka},
journal={Astronomy and Astrophysics},
year={2004},
volume={421},
pages={1149-1158}
}
• K. Ohnaka
• Published 2004
• Physics, Materials Science
• Astronomy and Astrophysics
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 the high-resolution 11 μ m spectra without any salient spectral features revealed by Weiner et al. ([CITE]). The angular diameters as well as the high-resolution spectra of α Ori and α Her obtained in the 11 μ m region can be reproduced by a warm water vapor envelope, whose presence in α Ori was revealed by Tsuji… Expand