A comparison of the anelastic and subseismic approximations for low-frequency stellar oscillations: an application to rapidly rotating stars

Details A comparison of the anelastic and subseismic approximations for low-frequency stellar oscillations: an application to rapidly rotating stars A comparison of the anelastic and subseismic approximations for low-frequency stellar oscillations: an application to rapidly rotating stars

2001-11-22

arxiv.org/abs/astro-ph/0111446v1

Astronomy and Astrophysics

Astrophysics

to appear in the proceedings of the Leuven IAU 185 Colloqium on `Radial and nonradial pulsations as probes of stellar physics'

Scientific paper

After showing that the anelastic approximation is better than the subseismic one to filter out acoustic waves when studying low-frequency stellar oscillations, we compute gravito-inertial modes of a typical Gamma-Doradus star using this approximation. We show that eigenmodes can be regular or singular, according to the possible focusing towards attractors of the underlying characteristics. Consequences on the oscillations spectrum are then discussed.

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