Cosmic Microwave Background Signatures from Current-carrying Cosmic Strings

Abstract

We continue our studies of the evolution and cosmological consequences of current-carrying cosmic string networks, described by a charge-velocity-dependent one scale (CVOS) model. We present a detailed calculation of the effects of these networks on the cosmic microwave background (CMB), in the context of this model, and specifically discuss how such current-carrying strings may be distinguished from their uncharged (Nambu-Goto) counterparts by current or forthcoming CMB data. We find that, under the CVOS hypothesis, the constraints on current-carrying strings should not differ much from those of their structureless counterparts in that the impact on the CMB can at most be reduced by a factor of ~25%. Nevertheless, the presence of a current and charge affects the distribution of power among scalar, vector and tensor modes, and also its distribution between small and large scales. It should therefore be possible for future high-sensitivity CMB experiments to distinguish between the two types of strings.

16 pages, 16 figures

References in corpus (14)

• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• Small-Angle CMB Temperature Anisotropies Induced by Cosmic Strings
• New CMB constraints for Abelian Higgs cosmic strings
• Constraints on the Nambu-Goto cosmic string contribution to the CMB power spectrum in light of new temperature and polarisation data
• CMB power spectrum of Nambu-Goto cosmic strings
• Models for Small-Scale Structure on Cosmic Strings: I. Mathematical Formalism
• Emission of gravitational waves by superconducting cosmic strings
• Generalised velocity-dependent one-scale model for current-carrying strings
• Optical analysis of a CMB cosmic string candidate
• Models for Small-Scale Structure on Cosmic Strings: II. Scaling and its stability
• High resolution calibration of the cosmic strings velocity dependent one-scale model
• A detailed study of the stability of vortons
• Multitension strings in high-resolution U(1)$\times$U(1) simulations
• Zero modes on cosmic strings in an external magnetic field

Cited by in corpus (2)

• Cosmic Strings as Dynamical Dark Energy: Novel Constraints
• Cosmic Strings-induced CMB anisotropies in light of Weighted Morphology