Synchrotron maser from weakly magnetised neutron stars as the emission mechanism of fast radio bursts

Abstract

The origin of Fast Radio Bursts (FRBs) is still mysterious. All FRBs to date show extremely high brightness temperatures, requiring a coherent emission mechanism. Using constraints derived from the physics of one of these mechanisms, the synchrotron maser, as well as observations, we show that accretion induced explosions of neutron stars with surface magnetic fields of $B_{\ast }\lesssim 10^{11}$ G are favoured as FRB progenitors.

arXiv comment6 pages, 1 figure. Accepted for publication in ApJ Letters. Revised discussion of the cyclotron maser in highly magnetised plasma

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