Scaling configurations of cosmic superstring networks and their cosmological implications

Abstract

We study the cosmic microwave background temperature and polarisation spectra sourced by multi-tension cosmic superstring networks. First we obtain solutions for the characteristic length scales and velocities associated with the evolution of a network of F-D strings, allowing for the formation of junctions between strings of different tensions. We find two distinct regimes describing the resulting scaling distributions for the relative densities of the different types of strings, depending on the magnitude of the fundamental string coupling g_s. In one of them, corresponding to the value of the coupling being of order unity, the network's stress-energy power spectrum is dominated by populous light F and D strings, while the other regime, at smaller values of g_s, has the spectrum dominated by rare heavy D strings. These regimes are seen in the CMB anisotropies associated with the network. We focus on the dependence of the shape of the B-mode polarisation spectrum on g_s and show that measuring the peak position of the B-mode spectrum can point to a particular value of the string coupling. Finally, we assess how this result, along with pulsar bounds on the production of gravitational waves from strings, can be used to constrain a combination of g_s and the fundamental string tension mu_F. Since CMB and pulsar bounds constrain different combinations of the string tensions and densities, they result in distinct shapes of bounding contours in the (mu_F, g_s) parameter plane, thus providing complementary constraints on the properties of cosmic superstrings.

23 pages, 8 figures, 3 tables; V2: matches published version (PRD)

References in corpus (19)

• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• Upper bounds on the low-frequency stochastic gravitational wave background from pulsar timing observations: current limits and future prospects
• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• Fitting CMB data with cosmic strings and inflation
• Small-Angle CMB Temperature Anisotropies Induced by Cosmic Strings
• CMB polarization power spectra contributions from a network of cosmic strings
• Constraints on string networks with junctions
• B-modes from Cosmic Strings
• Evolution of cosmic superstring networks: a numerical simulation
• B polarization of cosmic microwave background as a tracer of strings
• On the Collision of Cosmic Superstrings
• Kinematic Constraints on Formation of Bound States of Cosmic Strings - Field Theoretical Approach
• Gravitational wave signatures from kink proliferation on cosmic (super-) strings
• Cosmic string Y-junctions: a comparison between field theoretic and Nambu-Goto dynamics
• Wilson Line Inflation
• Detecting and distinguishing topological defects in future data from the CMBPol satellite
• On the degeneracy between primordial tensor modes and cosmic strings in future CMB data from Planck
• Quasar variability limits on cosmological density of cosmic strings
• Cosmic String Dynamics and Evolution in Warped Spacetime

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