Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings
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 inve...
| Main Authors: | , , |
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| Format: | Article |
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American Physical Society
2017
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| Online Access: | https://eprints.nottingham.ac.uk/48326/ |
| _version_ | 1848797739802951680 |
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| author | Rybak, I. Yu Avgoustidis, Anastasios Martins, C.J.A.P. |
| author_facet | Rybak, I. Yu Avgoustidis, Anastasios Martins, C.J.A.P. |
| author_sort | Rybak, I. Yu |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T20:08:40Z |
| format | Article |
| id | nottingham-48326 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T20:08:40Z |
| publishDate | 2017 |
| publisher | American Physical Society |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-483262020-05-04T19:19:30Z https://eprints.nottingham.ac.uk/48326/ Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings Rybak, I. Yu Avgoustidis, Anastasios Martins, C.J.A.P. 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. American Physical Society 2017-11-28 Article PeerReviewed Rybak, I. Yu, Avgoustidis, Anastasios and Martins, C.J.A.P. (2017) Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings. Physical Review D, 96 (10). 103535/1-103535/20. ISSN 2470-0029 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.96.103535 doi:10.1103/PhysRevD.96.103535 doi:10.1103/PhysRevD.96.103535 |
| spellingShingle | Rybak, I. Yu Avgoustidis, Anastasios Martins, C.J.A.P. Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings |
| title | Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings |
| title_full | Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings |
| title_fullStr | Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings |
| title_full_unstemmed | Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings |
| title_short | Semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings |
| title_sort | semi-analytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings |
| url | https://eprints.nottingham.ac.uk/48326/ https://eprints.nottingham.ac.uk/48326/ https://eprints.nottingham.ac.uk/48326/ |