EAS Publications Series
Volume 60, 2013Betelgeuse Workshop 2012 The Physics of Red Supergiants: Recent Advances and Open Questions
|Page(s)||155 - 159|
|Section||Atmospheric Structure and Dynamics|
|Published online||23 May 2013|
P. Kervella, T. Le Bertre and G. Perrin (eds)
EAS Publications Series, 60 (2013) 155-159
What is the Origin of the Water Vapour Signatures in Red Giant Stars?
Lund Observatory, Box 43, 221 20
2 School of Physics, Trinity College Dublin, College Green, Dublin 2, Ireland
3 LUPM, CNRS, Université Montpellier II, Pl. Bataillon, 34095 Montpellier Cedex, France
4 Department of Physics, University of California at Davis, One Shields Avenue, Davis, CA 95616, USA
5 Department of Physics & Astronomy, Box 516, 751 20 Uppsala, Sweden
We investigate the occurrence of water vapour signatures in a total of 10 red giants in the solar neighbourhood at mid-infrared wavelengths (12 μm). With the use of high resolution spectra from TEXES and synthesized spectra based on MARCS model atmospheres, we analyse the differences and discuss plausible causes. These include abundance adjustments, the addition of non-photospheric components (MOLspheres) and a different temperature profile.
© EAS, EDP Sciences 2013