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A Comparison of the Anelastic and Subseismic Approximations for Low-Frequency Stellar Oscillations: an Application to Rapidly Rotating Stars

Published online by Cambridge University Press:  12 April 2016

B. Dintrans  and
M. Rieutord
B. Dintrans
Affiliation:
Nordic Institute for Theoretical Physics, Copenhagen, Denmark Observatoire Midi-Pyrénées, 14 av. E. Belin, 31400 Toulouse, France
M. Rieutord
Affiliation:
Observatoire Midi-Pyrénées, 14 av. E. Belin, 31400 Toulouse, France France Institut Universitaire de France

Abstract

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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 γ 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.

Type
Part 2. Stellar Pulsation in Rotating Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 186 - 189
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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