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Effects of Dipole Magnetic Fields on Axisymmetric p-Mode Pulsations

Published online by Cambridge University Press:  12 April 2016

Hideyuki Saio  and
Alfred Gautschy
Hideyuki Saio
Affiliation:
Astronomical Institute, Graduate School of Science, Tohoku University, Sendai, Japan
Alfred Gautschy
Affiliation:
ETH-Library, Rämistrasse 101, 8092 Zürich, Switzerland

Extract

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We investigated nonradial pulsations in the presence of a dipole magnetic field in a non-rotating 1.7 M⊙ ZAMS star. Formally, like in the case of pulsation-rotation coupling (Lee & Saio, 1986), the angular dependence of the pulsations is expanded into a series of spherical harmonics of different latitudinal degrees l. To start with, we considered only axisymmetric (m = 0) modes under the adiabatic and the Cowling approximations. In contrast to previous studies of pulsation-magnetic field interaction (Dziembowski & Goode, 1996; Bigot et al., 2000; Cunha & Gough, 2000), we retained the latitudinal derivatives of the perturbed quantities.

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. 294 - 295
Copyright
Copyright © Astronomical Society of the Pacific 2002

References

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