Neutral Cosmic Strings
|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|
|Inviable||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||http://adsabs.harvard.edu/cgi-bin/bib_query?arXiv:1707.02397||None|
Definitions: LF Radio (3 MHz to 3 GHz); HF Radio (3 GHz to 30 GHz); Microwave (30 to 300 GHz)
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.