Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983mnras.202..903v&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 202, Mar. 1983, p. 903-925.
Astronomy and Astrophysics
Astronomy
10
Classifications, Rotating Fluids, Stellar Models, Stellar Oscillations, Stellar Rotation, Approximation, Asymptotic Methods, Coupled Modes, Perturbation Theory, Surface Properties, Wavelengths
Scientific paper
It is noted after consideration of the short wavelength normal modes of self-gravitating rotating polytropic disks in the Bardeen approximation that disk oscillations may be characterized in terms of p-modes, driven by pressure forces, and r-modes, driven by Coriolis forces. Coupling takes place as a result of differential rotation between the two, yielding mixed modes whose properties can be studied under the assumption of weak coupling. It is noted that mixed modes avoid the crossing of the p- and r-modes. Short wavelength analysis offers a basis for mode classification using phase diagram characteristics. Physical properties and qualitative features of these modes are revealed by the analysis presented.
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