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Amorphous alumina in the extended atmosphere of $\ alpha $ Orionis

Authors
  • Tijl, Verhoelst
  • Leen, Decin
  • R, Van Malderen
  • Sacha, Hony
  • Jan Cami
  • Kjell, Eriksson
  • G, Perrin
  • Pieter, Deroo
  • Bart, Vandenbussche
  • Lbfm, Waters
Type
Published Article
Journal
ScienceOpen Astronomy & Astrophysics
Publisher
ScienceOpen
Publication Date
Feb 01, 2006
Volume
447
Issue
1
Pages
311–324
Source
SETI Institute
License
Unknown

Abstract

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 in the photosphere but in a cooler layer of molecular material above it. Lately, these layers have been spatially resolved by near and mid-IR interferometry. In this paper, we try to reconcile the IR interferometric and ISO-SWS spectroscopic results on $\ alpha $ Orionis with a thorough modelling of the photosphere, molecular layer (s) and ...

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