Identification of gravity waves in hydrodynamical simulations*
1
Observatoire Midi-Pyrénées, CNRS UMR5572, 14 avenue Edouard Belin, 31400 Toulouse, France
2
NORDITA, Blegdamsvej 17, 2100 Copenhagen Ø, Denmark
Corresponding author: B. Dintrans, dintrans@ast.obs-mip.fr
Received:
31
October
2003
Accepted:
2
April
2004
The excitation of internal gravity waves by an entropy bubble oscillating in an isothermal atmosphere is investigated using direct two-dimensional numerical simulations. The oscillation field is measured by a projection of the simulated velocity field onto the anelastic solutions of the linear eigenvalue problem for the perturbations. This facilitates a quantitative study of both the spectrum and the amplitudes of excited g-modes.
Key words: hydrodynamics / waves / stars: oscillations / stellar dynamics
© ESO, 2004