Magnetar QPO intermittence and frequency drift could be caused by nonlinear three-mode coupling, with an axial-axial-polar triplet whose coupling strength depends on the internal magnetic field geometry.
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Nonlinear coupling between magnetar QPOs
Magnetar QPO intermittence and frequency drift could be caused by nonlinear three-mode coupling, with an axial-axial-polar triplet whose coupling strength depends on the internal magnetic field geometry.