Year: 2025
Type: article
Abstract: We investigate the emission of vector radiation by superconducting cosmic string loops, deriving general relations to characterize the vector radiation emission efficiency, and study its impact on the evolution of loops. Building on these results, we compute the stochastic gravitational wave background generated by a chiral superconducting cosmic string network, including the impact of vector radiation for the very first time. Our analysis reveals that strong coupling between superconducting cosmic strings and the vector field may lead to a substantial suppression of the gravitational wave signal, while moderate coupling may still produce a detectable signal. We demonstrate that, in this intermediate limit, the presence of superconductivity in cosmic strings may help reconcile their gravitational wave spectrum with pulsar timing array data for large enough values of current.
Authors: I. Yu. Rybak, L. Sousa
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G1483381719, G1690109813, G2194505657, G2262748287, Sem título, G2869582625, Instituto de Astrofísica e Ciências do Espaço, Instituto de Astrofísica e Ciências do Espaço, G3480869486, G3681454997, G3983181418, G4042783231, G4192228184, G425668148, G451917667, G526596183, Desvendando a natureza das cordas cósmicas, G5967599077, G614654678, G6255773888, G662651173, G6685758852, G7123698595
OpenAlex ID: W4409067026