Status and future of hydrodynamical model atmospheres
Abstract
Description
Since about 25 years ago work has been dedicated to the development of hydrodynamical model atmospheres for cool stars (of A to T spectral type). Despite their obviously sounder physical foundation in comparison with standard hydrostatic models, their general application has been rather limited. In order to understand why this is, and how to progress, we review the present status of hydrodynamical modelling of cool star atmospheres. The development efforts were and are motivated by the theoretical interest of understanding the dynamical processes operating in stellar atmospheres. To show the observational impact, we discuss examples in the fields of spectroscopy and stellar structure where hydrodynamical modelling provided results on a level qualitatively beyond standard models. We stress present modelling challenges, and highlight presently possible and future observations that would be particularly valuable in the interplay between model validation and interpretation of observables, to eventually widen the usage of hydrodynamical model atmospheres within the astronomical community.
Proc. 13th Cool Stars Workshop, Hamburg, 5-9 July 2004, F.Favata et al., eds.,7 pages, 5 figures
Proc. 13th Cool Stars Workshop, Hamburg, 5-9 July 2004, F.Favata et al., eds.,7 pages, 5 figures