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Radiation mechanism of Fast Radio Bursts

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Fast radio bursts (FRBs) are millisecond duration transient events of unknown physical origin. At least one FRB is located at a distance of several billion light years, and CHIME has established that there are many FRBs that repeat. Using very general arguments I will show that the radio emission is coherent, the magnetic field strength associated with the source of these events is 10 Gauss or more, and the electric field is of order 10{10} esu. I will describe recent works that magnetic field distortion and reconfiguration is responsible for the strong electric field and the coherent radiation produced in these enigmatic events. I will also address the polarization properties of the well-known repeater.

This talk is part of the Institute of Astronomy Colloquia series.

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