Large Angle CMB Fluctuations from Cosmic Strings with a Comological Constant

Abstract

In this paper, we present results for large-angle CMB anisotropies generated from high resolution simulations of cosmic string networks in a range of flat FRW universes with a cosmological constant. Using an ensemble of all-sky maps, we compare with the COBE data to infer a normalization (or upper bound) on the string linear energy density $\mu$. For a flat matter-dominated model (${\Omega }_M=1$) we find $G\mu /c^2\approx 0.7\times 10^{-6}$, which is lower than previous constraints probably because of the more accurate inclusion of string small-scale structure. For a cosmological constant within an observationally acceptable range, we find a relatively weak dependence with $G\mu /c^2$ less than 10% higher.

arXiv comment5 pages, 5 figures; replaced with version to appear in Physical Review D

References in corpus (14)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• 4-Year COBE DMR Cosmic Microwave Background Observations: Maps and Basic Results
• Cosmic String Production Towards the End of Brane Inflation
• Observational Constraints on Cosmic String Production During Brane Inflation
• Causality, randomness, and the microwave background
• CSL-1: a chance projection effect or serendipitous discovery of a gravitational lens induced by a cosmic string?
• CMB Anisotropy Induced by Cosmic Strings on Angular Scales $>15^{\prime }$
• COBE vs Cosmic Strings: An Analytical Model
• $\Pi$ in the Sky ? Microwave Anisotropies from Cosmic Defects
• The Implications of the COBE-DMR Results for Cosmic Strings
• RMS Anisotropy in the COBE-DMR Four-Year Sky Maps
• Large Angular Scale CMB Anisotropy Induced by Cosmic Strings
• Fluctuations in the CMB Induced by Cosmic Strings: Methods and Formalism
• Cosmic strings, loops, and linear growth of matter perturbations

Cited by in corpus (52)

• Non-Gaussianity from Inflation: Theory and Observations
• Cosmic F- and D-strings
• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• Bounds on Cosmic Strings from WMAP and SDSS
• Scaling of Multi-Tension Cosmic Superstring Networks
• Constraints on Supersymmetric Models of Hybrid Inflation
• Small-Angle CMB Temperature Anisotropies Induced by Cosmic Strings
• CMB power spectra from cosmic strings: predictions for the Planck satellite and beyond
• Seeking String Theory in the Cosmos
• Brane Inflation and Cosmic String Tension in Superstring Theory
• Cosmic String constraints from WMAP and the South Pole Telescope
• Constraints on Supersymmetric Grand Unified Theories from Cosmology
• Anatomy of F_D-Term Hybrid Inflation
• Cosmic strings and their induced non-Gaussianities in the cosmic microwave background
• WMAP constraints on inflationary models with global defects
• Cosmic microwave anisotropies from BPS semilocal strings
• Cosmic Microwave Background constraints for global strings and global monopoles
• Confronting hybrid inflation in supergravity with CMB data
• Cosmic Strings as the Source of Small-Scale Microwave Background Anisotropy
• Cosmic Strings
• Observing cosmic string loops with gravitational lensing surveys
• Reply to "Comment on "Effects of cosmic-string framework on the thermodynamical properties of anharmonic oscillator using the ordinary statistics and the q-deformed superstatistics approaches""
• Cosmic Superstring Gravitational Lensing Phenomena: Predictions for Networks of (p,q) Strings
• Supergravity Modification of D-term Hybrid Inflation: Solving the Cosmic String and Spectral Index Problems via a Right-Handed Sneutrino
• CMB power spectrum of Nambu-Goto cosmic strings
• All sky CMB map from cosmic strings integrated Sachs-Wolfe effect
• The Rise and Fall of the Cosmic String Theory for Cosmological Perturbations
• Production of Topological Defects at the End of Inflation
• Production of topological defects at the end of inflation
• Multi-Scale Pipeline for the Search of String-Induced CMB Anisotropies
• Cosmic String Detection via Microlensing of Stars
• Early reionization by cosmic strings revisited
• Enlarging the parameter space of standard hybrid inflation
• Leptogenesis from reheating after inflation and cosmic string decay
• Cosmic string induced CMB maps
• Cosmic String Lensing and Closed Time-like Curves
• Peak-peak correlations in the cosmic background radiation from cosmic strings
• B-L Cosmic strings and Baryogenesis
• Correlations between cosmic strings and extra relativistic species
• Cosmic strings and other topological defects in nonscaling regimes
• Correlations between 21 cm Radiation and the CMB from Active Sources
• The Revival of Cosmic Strings
• Cosmic strings in a space-time with positive cosmological constant
• Consistency of cosmic strings with cosmic microwave background measurements
• Baryogenesis via Leptogenesis in presence of cosmic strings
• Evolution of FLRW spacetime after the birth of a cosmic string
• Constraint on $B-L$ cosmic string from leptogenesis with degenerate neutrinos
• Formation of Wakes by Chiral, Conducting Cosmic Strings
• Inflation, Strings, CMB anisotropies and Leptogenesis
• The interplay between high energy physics and cosmology: an example
• GUT cosmic strings and inflation
• Cosmic Microwave Background anisotropies: the power spectrum and beyond