Axion Quark Nugget and NS
|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|
|Collision / Interaction||Axion Quark Nuggest and NS||Repeat||Mag. reconnection||Curv.||Yes||Possible||Possible||--||--||--||--||--||--||http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1806.02352||None|
Definitions: LF Radio (3 MHz to 3 GHz); HF Radio (3 GHz to 30 GHz); Microwave (30 to 300 GHz)
In close analogy with the axion quark nugget (AQN) mechanism for generating solar nano flares, an AQN falling through an opportunely complicated region in a NS’s magnetosphere may be able to produce sufficient magnetic energy to power FRBs. Shock waves caused by the infalling AQN would trigger magnetic reconnection, and produce a giant flare.
The predicted event rate is consistent with observations, but the emission timescale (∼10−100 ms) is larger than what is observed. This discrepancy can be accounted for if the beam moves across the sky, allowing us only a glimpse of the emission. A curvature radiation mechanism is invoked, which predicts a maximum cut-off frequency at infra-red wavelengths; observed counterparts with higher frequencies would invalidate this model. Given the random nature of these events, repeating FRBs would be non-periodic. A correlation between the total energy and duration of the flare is predicted, however because only a fraction of the entire beam would be observed, this relationship would be difficult to verify.