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On the Combined Effects of a Magnetic Field and Rotation on Acoustic Modes

Published online by Cambridge University Press:  12 April 2016

L. Bigot  and
W.A. Dziembowski
L. Bigot
Affiliation:
Observatoire de la Côte d’Azur, Nice, France, e-mail:lbigot@obs-nice.fr
W.A. Dziembowski
Affiliation:
N. Copernicus Astronomical center, Warsaw, Poland

Abstract

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We present new results on the effects of a strong dipole magnetic field and rotation on p-mode oscillations. We take into account both Coriolis and centrifugal distortion as manifestations of rotation. We apply these improvements to the case of dipole (l = 1) modes. We show that these modes, during the pulsation cycle, move the stellar surface in a plane, which is inclined from both magnetic and rotation axes. In general, the displacement vector describes an ellipse in that plane. This work is devoted to the study of the roAp star pulsations.

Type
Part 2.3. Chemically Peculiar Stars
Information
International Astronomical Union Colloquium , Volume 185: Radial and Nonradial Pulsations as Probes of Stellar Physics , 2002 , pp. 290 - 293
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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