Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings

Rybak, I. Yu; Avgoustidis, Anastasios; Martins, C.J.A.P.

Abstract

We study how the presence of world-sheet currents affects the evolution of cosmic string networks, and their impact on predictions for the cosmic microwave background (CMB) anisotropies generated by these networks. We provide a general description of string networks with currents and explicitly investigate in detail two physically motivated examples: wiggly and superconducting cosmic string networks. By using a modified version of the CMBact code, we show quantitatively how the relevant network parameters in both of these cases influence the predicted CMB signal. Our analysis suggests that previous studies have overestimated the amplitude of the anisotropies for wiggly strings. For superconducting strings the amplitude of the anisotropies depends on parameters which presently are not well known-but which can be measured in future high resolution numerical simulations.

Citation

Rybak, I. Y., Avgoustidis, A., & Martins, C. (2017). Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings. Physical Review D, 96(10), Article 103535. https://doi.org/10.1103/PhysRevD.96.103535

• Journal Article Type: Article
• Acceptance Date: Oct 31, 2017
• Publication Date: Nov 28, 2017
• Deposit Date: Nov 24, 2017
• Publicly Available Date: Nov 28, 2017
• Journal: Physical Review D
• Print ISSN: 2470-0010
• Electronic ISSN: 2470-0029
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 96
• Issue: 10
• Article Number: 103535
• DOI: https://doi.org/10.1103/PhysRevD.96.103535
• Public URL: https://nottingham-repository.worktribe.com/output/896882
• Publisher URL: https://journals.aps.org/prd/abstract/10.1103/PhysRevD.96.103535
• Contract Date: Nov 24, 2017