| Issue |
EAS Publications Series
Volume 60, 2013
Betelgeuse Workshop 2012 The Physics of Red Supergiants: Recent Advances and Open Questions
|
|
|---|---|---|
| Page(s) | 85 - 92 | |
| Section | Atmospheric Structure and Dynamics | |
| DOI | https://doi.org/10.1051/eas/1360009 | |
| Published online | 23 May 2013 | |
P. Kervella, T. Le Bertre and G. Perrin (eds)
EAS Publications Series, 60 (2013) 85-92
Atmosphere tomography of red supergiant stars
1
Institut d’Astronomie et d’Astrophysique, Université Libre de
Bruxelles, CP. 226, Boulevard du
Triomphe, 1050
Bruxelles,
Belgium
2
Laboratoire Lagrange, UMR 7293, Observatoire de la Côte d’Azur,
Université de Nice Sophia-Antipolis, Bd. de l’Observatoire,
BP. 4229, 06304
Nice Cedex 4,
France
3
LUPM cc072, Université Montpellier II,
34095
Montpellier Cedex 5,
France
3-D simulations suggest that the atmospheres of red supergiants are subject to large-amplitude convective motions, which are suspected to generate supersonic motions and shocks. We perform tomography of supergiant-star atmospheres, on temporal series of high-resolution spectra and on 3-D hydrodynamical synthetic spectra. The tomographic technique is improved by the computation of the contribution function, which is used to construct numerical spectral masks probing different optical depths. This exploratory work allows us to put spatial and temporal constraints on velocity fields predicted by 3-D model atmospheres.
© EAS, EDP Sciences 2013