Neutral Cosmic Strings: Difference between revisions

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== Model Description ==
== Model Description ==


To be filled in with updated draft. ***Jake and Amanda, should this go into the "void" section?
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, emitting a beam of coherent radiation. The decay particle can ostensibly be of any energy and frequency range, and so should extend down into radio bursts. Cusp decay from cosmic strings has been put forward to explain FRBs [285]. The event rate, timescale, and flux emitted are shown to be consistent with FRB data, however the relativistic effects on the cusp shape was not factored in. By taking this into account, cusp decay is in fact incompatible with current FRB data [286]. Cosmic strings are not ruled out by observations, and would necessarily include counterparts of other electromagnetic frequencies—specifically, GRBs [287], cosmic rays [288] and neutrinos [289]—and GWs.


== Observational Constraints ==
== Observational Constraints ==


To be filled in with updated draft
To be filled in with updated draft

Revision as of 07:05, 10 October 2018





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
Other Neutral Cosmic Strings Single Cusp decay -- Yes -- -- -- -- -- GRB
if jet aligned
Yes Yes https://arxiv.org/pdf/1701.01109.pdf High energy cosmic rays are also expected.

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, emitting a beam of coherent radiation. The decay particle can ostensibly be of any energy and frequency range, and so should extend down into radio bursts. Cusp decay from cosmic strings has been put forward to explain FRBs [285]. The event rate, timescale, and flux emitted are shown to be consistent with FRB data, however the relativistic effects on the cusp shape was not factored in. By taking this into account, cusp decay is in fact incompatible with current FRB data [286]. Cosmic strings are not ruled out by observations, and would necessarily include counterparts of other electromagnetic frequencies—specifically, GRBs [287], cosmic rays [288] and neutrinos [289]—and GWs.

Observational Constraints

To be filled in with updated draft