Nonlinear pseudo-radial oscillation of a rotating magnetic star |
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| Authors: | M K Das |
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| Institution: | (1) Theoretical Astronomy Unit, School of Mathematical Sciences, Queen Mary College, University of London, UK;(2) Present address: Department of Physics and Electronics, Sri Venkateswara College, University of Delhi, India |
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| Abstract: | The nonlinear pseudo-radial mode of oscillation of a rotating magnetic star is studied. It is shown that for a general rotational field, the coupling between magnetic field and rotation tends to reduce the average rotational energy parameterT. This result in a lowering of the maximum pulsation amplitudeq
max, which depends on strength of rotation and magnetic field. The configuration tends, therefore, to a new equilibrium state at lower value ofq
max. The analytic solution of the pulsation equation for the case ofy=5/3 in the presence of rotation and magnetic field has also been derived in the Appendix. |
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