Disruption of Cosmic String Wakes by Gaussian Fluctuations

Abstract

We study the stability of cosmic string wakes against the disruption by the dominant Gaussian fluctuations which are present in cosmological models. We find that for a string tension given by $G\mu =10^{-7}$ wakes remain locally stable until a redshift of $z=6$, and for a value of $G\mu =10^{-14}$ they are stable beyond a redshift of $z=20$. We study a global stability criterion which shows that wakes created by strings at times after $t_{eq}$ are identifiable up to the present time, independent of the value of $G\mu$. Taking into account our criteria it is possible to develop strategies to search for the distinctive position space signals in cosmological maps which are induced by wakes.

arXiv comment10 pages, 3 figures. We have added a paragraph to the conclusion discussing the experimental prospects from the Square Kilometre Array of observing a $G\mu =10^{-9}$ wake. Some typos were also corrected. The text now agrees with the published version

References in corpus (40)

• Cosmic strings
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• The Four-Year COBE Normalization and Large-Scale Structure
• On the Generation of a Scale-Invariant Spectrum of Adiabatic Fluctuations in Cosmological Models with a Contracting Phase
• Duality Invariance of Cosmological Perturbation Spectra
• The number of cosmic string loops
• Planck 2013 results. XXV. Searches for cosmic strings and other topological defects
• Cosmological evolution of cosmic string loops
• Producing a Scale-Invariant Spectrum of Perturbations in a Hagedorn Phase of String Cosmology
• Large parallel cosmic string simulations: New results on loop production
• Power Spectra in Global Defect Theories of Cosmic Structure Formation
• String Gas Cosmology
• Observational Constraints on Cosmic String Production During Brane Inflation
• Topological Defects and Structure Formation
• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• Fitting CMB data with cosmic strings and inflation
• Scaling of cosmic string loops
• Bounds on Cosmic Strings from WMAP and SDSS
• Cosmic string loop distribution on all length scales and at any redshift
• Constraints on Supersymmetric Models of Hybrid Inflation
• Updated constraints on the cosmic string tension
• The Matter Bounce Alternative to Inflationary Cosmology
• Cosmic String constraints from WMAP and the South Pole Telescope
• Doppler peaks from active perturbations
• The 21 cm Signature of Cosmic String Wakes
• Limits on Defects Formation and Hybrid Inflationary Models with Three-Year WMAP Observations
• Detecting Cosmic Strings in the CMB with the Canny Algorithm
• Canny Algorithm, Cosmic Strings and the Cosmic Microwave Background
• Searching for Cosmic Strings in New Observational Windows
• Edge Detection, Cosmic Strings and the South Pole Telescope
• A Signature of Cosmic Strings Wakes in the CMB Polarization
• Spectral Analysis of Microwave Background Perturbations Induced by Cosmic Strings
• Constraints on Brane Inflation and Cosmic Strings
• The Structure of Cosmic String Wakes
• The 21 cm Signature of Shock Heated and Diffuse Cosmic String Wakes
• Angular 21 cm Power Spectrum of a Scaling Distribution of Cosmic String Wakes
• Observational Constraints on Varying-alpha Domain Walls
• The Wouthuysen Field Absorption Trough in Cosmic Strings Wakes
• Searching for Signatures of Cosmic String Wakes in 21cm Redshift Surveys using Minkowski Functionals
• Angular Power Spectrum of B-mode Polarization from Cosmic String Wakes

Cited by in corpus (12)

• Searching for Cosmic Strings in CMB Anisotropy Maps using Wavelets and Curvelets
• A Bayesian Framework for Cosmic String Searches in CMB Maps
• A Convolutional Neural Network For Cosmic String Detection in CMB Temperature Maps
• Dark Matter Distribution Induced by a Cosmic String Wake in the Nonlinear Regime
• Extracting the Signal of Cosmic String Wakes from 21-cm Observations
• Cosmic Filaments from Cosmic Strings
• Information Theoretic Bounds on Cosmic String Detection in CMB Maps with Noise
• Inferring Cosmic String Tension through the Neural Network Prediction of String Locations in CMB Maps
• Signal of Cosmic Strings in Cross-Correlation of 21-cm Redshift and CMB Polarization Maps
• Diffusion of massive particles around an Abelian-Higgs string
• Cosmic String Wake Detection using 3D Ridgelet Transformations
• Signature of a Cosmic String Wake at $z=3$