Neutral Cosmic Strings

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Summary Table
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
Void Neutral Cosmic Strings Single N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A

Definitions: LF Radio (3 MHz to 3 GHz); HF Radio (3 GHz to 30 GHz); Microwave (30 to 300 GHz)

Model Description

Nambu-Goto (infinitely thin, idealised) cosmic strings generically form cusps---portions of the string which fold back onto themselves and move at the speed of light. The cusps decay to form a beam of coherent radiation, where the emission can ostensibly be of any energy and frequency range. As such, cusp decay has been considered as an FRB origin. The event rate, timescale, and flux are shown to be consistent with FRB data, however the relativistic effects on the cusp shape where not originally considered. By taking this into account, the consistency of the theory breaks down.

Observational Constraints