NS to KNBH
|Category||Progenitor||Type||Energy Mechanism||Emission Mechanism||Counterparts||References||Brief Comments|
|LF Radio||HF Radio||Microwave||Terahertz||Optical/IR||X-rays||Gamma-rays||Gravitational Waves||Neutrinos|
|Collapse||NS to KNBH||Single||Mag. reconnection||Curv.||Yes||--||--||--||--||--||--||Yes||--||https://arxiv.org/abs/1307.1409.pdf, https://arxiv.org/abs/1603.05509||Possible X-ray afterglow and a short/long GRB created in NS birth prior to the FRB.|
Definitions: LF Radio (3 MHz to 3 GHz); HF Radio (3 GHz to 30 GHz); Microwave (30 to 300 GHz)
Upon the collapse of a supramassive NS into a NKBH, an event horizon will likely form before most of the mass and radiation can escape. By the no-hair theorem, magnetic fields are forbidden from piercing the event horizon, and so the magnetosphere will be left behind. Alternatively, if a NS collapses into a metastable KNBH, its electric discharge can cause the magnetosphere to be shed. Violent magnetic reconnection outside the horizon would then induce a strong magnetic shock wave that moves through the remaining plasma at the speed of light, resulting in a single FRB.