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

TL;DR

This paper proposes that weakly magnetized neutron stars undergoing accretion-induced explosions can produce Fast Radio Bursts through a synchrotron maser emission mechanism, explaining their high brightness temperatures.

Contribution

It introduces a new model linking weakly magnetized neutron stars and accretion explosions as the source of FRBs, supported by physical constraints and observations.

Findings

Weak magnetic fields ($B_*\lesssim10^{11}$ G) are consistent with FRB progenitors.

Accretion-induced neutron star explosions can generate coherent radio emission.

The synchrotron maser mechanism explains the high brightness temperatures of FRBs.

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 $B_*\lesssim10^{11}$ G are favoured as FRB progenitors.