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Resonance Between Pulsation Modes Due to Tidal Perturbation

Published online by Cambridge University Press:  07 August 2017

Z. Kolláth  and
J. Nuspl
Z. Kolláth
Affiliation:
Konkoly Observatory P.O. Box 67 H-1525 Budapest Hungary
J. Nuspl
Affiliation:
Konkoly Observatory P.O. Box 67 H-1525 Budapest Hungary

Abstract

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The effect of tidal perturbation to stellar pulsation is a relatively underdeveloped problem in the theory of variable stars. We derive amplitude equations describing the resonances between pulsational modes and orbital motion taking into consideration the rotation of stars as well. In the case of δ Scuti stars the two-mode-tidal resonance was found to be the most powerful effect. If the difference between frequencies of excited and damped mode is close to the orbital frequency, parametric excitation of the damped mode may occur, while the other mode loses energy. We discuss this effect for a wide range of parameters.

Type
Oral and Contributed Papers
Information
Symposium - International Astronomical Union , Volume 151: Evolutionary Processes in Interacting Binary Stars , 1992 , pp. 289 - 292
Copyright
Copyright © Kluwer 1992 

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