Abstract We revisit in this work a model for repeating Fast Radio Bursts based of the release of energy provoked by the magnetic field dynamics affecting a magnetar’s crust. We address the basics of such a model by solving the propagation of the perturbation approximately, and quantify the energetics and the radiation by bunches of charges in the so-called charge starved region in the magnetosphere. The (almost) simultaneous emission of newly detected X-rays from SGR 1935+2154 is tentatively associated with a reconnection behind the propagation. The strength of f-mode gravitational radiation excited by the event is quantified, and more detailed studies of the nonlinear (spiky) soliton solutions are suggested.
Keywords stars: magnetars – relativistic processes – radiation mechanisms: non-thermal
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