Superconducting cosmic strings as sources of cosmological fast radio bursts

Abstract

In this paper we calculate the radio burst signals from three kinds of structures of superconducting cosmic strings. By taking into account the observational factors including scattering and relativistic effects, we derive the event rate of radio bursts as a function of redshift with the theoretical parameters Gμ and I of superconducting strings. Our analyses show that cusps and kinks may have noticeable contributions to the event rate and in most cases cusps would dominate the contribution, while the kink-kink collisions tend to have secondary effects. By fitting theoretical predictions with the normalized data of fast radio bursts, we for the first time constrain the parameter space of superconducting strings and report that the parameter space of Gμ ∼ [10 −14 , 10 −12 ] and I ∼ [10 −1 , 10 2 ] GeV fit the observation well although the statistic significance is low due to the lack of observational data. Moreover, we derive two types of best fittings, with one being dominated by cusps with a redshift z = 1.3, and the other dominated by kinks at the range of the maximal event rate.

A Search for Neutrino Emission from Fast Radio Bursts with Six Years of IceCube Data

“…It has been proposed that cosmological FRBs could be linked to exotic phenomena such as oscillations of superconducting cosmic strings (Ye et al 2017), and some authors predict that such cosmic strings could also produce ultra-high-energy cosmic rays and neutrinos from super heavy particle decays (Berezinsky et al 2009;Lunardini & Sabancilar 2012). Therefore, both multi-wavelength and multi-messenger follow-ups can provide crucial information to help decipher the origin of FRBs.…”

Updated constraints on superconducting cosmic strings from the astronomy of fast radio bursts

“…These primordial relics, if they exist in the sky, could behave as giant wires that may release electromagnetic signals in a wide range of frequencies [27,28]. Thus, it is natural to explore the hypothetical possibility for SCSs to explain the observed FRB events, namely, due to the oscillations of string loops [29], dynamics of string cusps and kinks [30][31][32], and effects of the magnetic field upon string loops [33].…”

Multi-kink scattering in the double sine-Gordon model

“…Kinks, domain walls and other topological defects arise in a great amount of models, hence they are very important for various physical applications from condensed matter to high energy physics and cosmology [78][79][80][81][82][83][84][85], see also [2]. Many physical phenomena could be effectively described by one-dimensional topological structures.…”