Semianalytic calculation of cosmic microwave background anisotropies from wiggly and superconducting cosmic strings

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.

20 pages, 10 figures. Fixed typos in eqs.(3), (5)-(7), (12)-(14), (29), (32)

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Cited by in corpus (14)

• Extending and Calibrating the Velocity dependent One-Scale model for Cosmic Strings with One Thousand Field Theory Simulations
• Emission of gravitational waves by superconducting cosmic strings
• Generalised velocity-dependent one-scale model for current-carrying strings
• Charge-velocity-dependent one-scale linear model
• Gravitating superconducting solitons in the (3+1)-dimensional Einstein gauged non-linear sigma-model
• CMB anisotropies generated by cosmic string loops
• Excited cosmic strings with superconducting currents
• Cosmological evolution of Witten superconducting string networks
• Exact \textit{pp}-waves, (A)dS waves and Kundt spaces in the Abelian-Higgs model
• Revisit of Y-junctions for strings with currents: transonic elastic case
• Collisions of cosmic strings with chiral currents
• Cosmic Microwave Background anisotropies generated by cosmic strings with small-scale structure
• Cosmic Microwave Background Signatures from Current-carrying Cosmic Strings
• Dynamical simulations of colliding superconducting strings