Level Crossing Analysis of Cosmic Microwave Background Radiation: A method for detecting cosmic strings

Abstract

In this paper we study the footprint of cosmic string as the topological defects in the very early universe on the cosmic microwave background radiation. We develop the method of level crossing analysis in the context of the well-known Kaiser-Stebbins phenomenon for exploring the signature of cosmic strings. We simulate a Gaussian map by using the best fit parameter given by WMAP-7 and then superimpose cosmic strings effects on it as an incoherent and active fluctuations. In order to investigate the capability of our method to detect the cosmic strings for the various values of tension, $G\mu$, a simulated pure Gaussian map is compared with that of including cosmic strings. Based on the level crossing analysis, the superimposed cosmic string with $G\mu \gtrsim 4\times 10^{-9}$ in the simulated map without instrumental noise and the resolution $R=1^{\prime }$ could be detected. In the presence of anticipated instrumental noise the lower bound increases just up to $G\mu \gtrsim 5.8\times 10^{-9}$.

27 pages, 17 figures. V2: Removed some trivial parts and figures, added references. Accepted for publication in JCAP

References in corpus (56)

• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Efficient Computation of CMB anisotropies in closed FRW models
• Multifractal detrended fluctuation analysis of nonstationary time series
• Cosmic strings
• Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Power Spectra and WMAP-Derived Parameters
• An All-Sky Analysis of Polarization in the Microwave Background
• False Vacuum Inflation with Einstein Gravity
• Cosmic String Production Towards the End of Brane Inflation
• Cosmic F- and D-strings
• Gravitational radiation from cosmic (super)strings: bursts, stochastic background, and observational windows
• Upper bounds on the low-frequency stochastic gravitational wave background from pulsar timing observations: current limits and future prospects
• Multifractal Detrended Fluctuation Analysis of Sunspot Time Series
• The South Pole Telescope
• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• Measuring Statistical isotropy of the CMB anisotropy
• Fitting CMB data with cosmic strings and inflation
• Bounds on Cosmic Strings from WMAP and SDSS
• Interferometric Observation of Cosmic Microwave Background Anisotropies
• Updated constraints on the cosmic string tension
• Small-Angle CMB Temperature Anisotropies Induced by Cosmic Strings
• CMB power spectra from cosmic strings: predictions for the Planck satellite and beyond
• Brane Inflation and Cosmic String Tension in Superstring Theory
• COBE vs Cosmic Strings: An Analytical Model
• Testing Global Isotropy of Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Data: Temperature Analysis
• Evolution of cosmic superstring networks: a numerical simulation
• Bayesian Analysis of the Chaplygin Gas and Cosmological Constant Models using the SNe Ia Data
• Cosmic strings and their induced non-Gaussianities in the cosmic microwave background
• WMAP constraints on inflationary models with global defects
• The 21 cm Signature of Cosmic String Wakes
• The CMB temperature bispectrum induced by cosmic strings
• Detection and discrimination of cosmological non-Gaussian signatures by multi-scale methods
• A Cosmic String Specific Signature on the Cosmic Microwave Background
• Canny Algorithm, Cosmic Strings and the Cosmic Microwave Background
• The discriminating power of wavelets to detect non-Gaussianity in the CMB
• Cosmic Strings
• The correlation of peaks in the microwave background
• Edge Detection, Cosmic Strings and the South Pole Telescope
• Cosmic String Power Spectrum, Bispectrum and Trispectrum
• Observational constraints on light cosmic strings from photometry and pulsar timing
• On the Statistics of CMB Fluctuations Induced by Topological Defects
• Fluctuations in the CMB Induced by Cosmic Strings: Methods and Formalism
• Level Crossing Analysis of the Stock Markets
• Level Crossing Analysis of Growing surfaces
• Power-law Parameterized Quintessence Model
• Full-sky correlations of peaks in the microwave background
• Wavelet domain Bayesian denoising of string signal in the cosmic microwave background
• Statistical Theory for the Kardar-Parisi-Zhang Equation in 1+1 Dimension
• Cosmic string induced CMB maps
• Skewness in CMB temperature fluctuations from curved cosmic (super-)strings
• Waveforms for Gravitational Radiation from Cosmic String Loops
• Searching for Signatures of Cosmic Superstrings in the CMB
• Quasar variability limits on cosmological density of cosmic strings
• Probing Cosmic Strings with Satellite CMB measurements
• Effect of component separation on the temperature distribution of the CMB
• Level Crossing Analysis of Burgers Equation in 1+1 Dimensions
• Exact Analysis of Level-Crossing Statistics for (d+1)-Dimensional Fluctuating Surfaces

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• Wavelet-Bayesian inference of cosmic strings embedded in the cosmic microwave background
• Clustering of Local Extrema in Planck CMB maps
• Cosmic String Detection with Tree-Based Machine Learning
• Analysis of fractional Gaussian noises using level crossing method
• Inferring Cosmic String Tension through the Neural Network Prediction of String Locations in CMB Maps
• Probing the Anisotropy and Non-Gaussianity in the Redshift Space through the Conditional Moments of the First Derivative
• Crossing Statistics of Anisotropic Stochastic Surface
• Cosmic Strings-induced CMB anisotropies in light of Weighted Morphology
• Crossing statistics of laser light scattered through a nanofluid