Institute of Astronomy

Radiation mechanism of Fast Radio Bursts

SpeakerTalk DateTalk Series
Pawan Kumar (UT Austin)23 May 2019Institute of Astronomy Colloquia

Abstract

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^{14} 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.

Presentation

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