Fast Radio Bursts from reconnection events in magnetar magnetospheres

Abstract

Lyutikov (2002) predicted "radio emission from soft gamma-ray repeaters (SGRs) during their bursting activity". Detection of a Mega-Jansky radio burst in temporal coincidence with high energy bursts from a Galactic magnetar SGR 1935+2154 confirms that prediction. Similarity of this radio event with Fast Radio Bursts (FRBs) suggests that FRBs are produced within magnetar magnetospheres. We demonstrate that SGR 1935+2154 satisfies the previously derived constraints on the physical parameters at the FRBs' loci. Coherent radio emission is generated in the inner parts of the magnetosphere at $r<100R_{\mathrm{NS}}$. The radio emission is produced by the yet unidentified plasma emission process, occurring during the initial stages of reconnection events.

References in corpus (2)

• Possible periodic activity in the repeating FRB 121102
• Hyperflares of SGRs as an engine for millisecond extragalactic radio bursts

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