Nonlinear pseudo-radial oscillation of a rotating magnetic star (Q1062546)

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 parameter T. This result in a lowering of the maximum pulsation amplitude \(q_{\max}\), which depends on strength of rotation and magnetic field. The configuration tends, therefore, to a new equilibrium state at lower value of \(q_{\max}\). The analytic solution of the pulsation equation for the case of \(y=5/3\) in the presence of rotation and magnetic field has also been derived in the appendix.