NS-WD Merger
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| 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 | |||||||
| Merger | NS-WD | Single | Mag. reconnection | Curv. | Yes | Yes | -- | -- | -- | -- | -- | -- | -- | http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1712.03509 | |
Definitions: LF Radio (3 MHz to 3 GHz); HF Radio (3 GHz to 30 GHz); Microwave (30 to 300 GHz)
Model Description
Upon NS-WD coalescence, magnetic reconnection injects relativistic electrons from the surface of the WD into the magnetosphere of the NS to create an FRB. The timescale of the burst is assumed to be from the time of electron injection to the formation of the final merged object. It is predicted that the shorter the intrinsic width of the FRB, the higher the flux density.
Observational Constraints
Of the 28 FRBs analysed (those available at the time), the pulse widths were broader than expected in the NS-WD scenario, but perhaps pulse widths vary more widely between FRBs due to multipath scattering through the IGM.