Detecting Cosmic Strings in the CMB with the Canny Algorithm

Abstract

Line discontinuities in cosmic microwave background anisotropy maps are a distinctive prediction of models with cosmic strings. These signatures are visible in anisotropy maps with good angular resolution and should be identifiable using edge detection algorithms. One such algorithm is the Canny algorithm. We study the potential of this algorithm to pick out the line discontinuities generated by cosmic strings. By applying the algorithm to small-scale microwave anisotropy maps generated from theoretical models with and without cosmic strings, we find that, given an angular resolution of several minutes of arc, cosmic strings can be detected down to a limit of the mass per unit length of the string which is one order of magnitude lower than the current upper bounds.

8 pages, 5 figures short discussion of parameter dependence added, typos corrected

References in corpus (36)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• A Line of Sight Approach to Cosmic Microwave Background Anisotropies
• Cosmic strings
• Cosmological parameters from combining the Lyman-alpha forest with CMB, galaxy clustering and SN constraints
• Cosmic String Production Towards the End of Brane Inflation
• Cosmic F- and D-strings
• How generic is cosmic string formation in SUSY GUTs
• Upper bounds on the low-frequency stochastic gravitational wave background from pulsar timing observations: current limits and future prospects
• Producing a Scale-Invariant Spectrum of Perturbations in a Hagedorn Phase of String Cosmology
• Power Spectra in Global Defect Theories of Cosmic Structure Formation
• 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
• Bounds on Cosmic Strings from WMAP and SDSS
• String Gas Cosmology and Structure Formation
• Interferometric Observation of Cosmic Microwave Background Anisotropies
• Measurement of a Peak in the Cosmic Microwave Background Power Spectrum from the North American test flight of BOOMERANG
• Causality, randomness, and the microwave background
• Small-Angle CMB Temperature Anisotropies Induced by Cosmic Strings
• COBE vs Cosmic Strings: An Analytical Model
• Doppler peaks from active perturbations
• Search for Cosmic Strings in CMB Anisotropies
• A Supersymmetric SO(10) Model with Inflation and Cosmic Strings
• Limits on Defects Formation and Hybrid Inflationary Models with Three-Year WMAP Observations
• Introduction to Cosmic F- and D-Strings
• A Cosmic String Specific Signature on the Cosmic Microwave Background
• Spectral Analysis of Microwave Background Perturbations Induced by Cosmic Strings
• Inflationary String Theory?
• On the Statistics of CMB Fluctuations Induced by Topological Defects
• Inflation and String Cosmology
• Higgs Mechanism in the Presence of a Topological Term
• The Validity of the Cosmic String Pattern Search with the Cosmic Microwave Background
• Cosmic String Loops and Gravitational Radiation
• Gamma Ray Burst Neutrinos Probing Quantum Gravity
• Inflation from String Theory

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• First Observational Tests of Eternal Inflation: Analysis Methods and WMAP 7-Year Results
• Cosmic strings and their induced non-Gaussianities in the cosmic microwave background
• The 21 cm Signature of Cosmic String Wakes
• Canny Algorithm, Cosmic Strings and the Cosmic Microwave Background
• Cosmic Strings as the Source of Small-Scale Microwave Background Anisotropy
• Searching for Cosmic Strings in New Observational Windows
• A Signature of Cosmic Strings Wakes in the CMB Polarization
• Edge Detection, Cosmic Strings and the South Pole Telescope
• String Gas Cosmology after Planck
• Searching for Cosmic Strings in CMB Anisotropy Maps using Wavelets and Curvelets
• Compressed sensing reconstruction of a string signal from interferometric observations of the cosmic microwave background
• Wavelet-Bayesian inference of cosmic strings embedded in the cosmic microwave background
• Unconventional Cosmology
• Non-Thermal Dark Matter from Cosmic Strings
• Massive black holes at high redshifts from superconducting cosmic strings
• A Bayesian Framework for Cosmic String Searches in CMB Maps
• Wavelet domain Bayesian denoising of string signal in the cosmic microwave background
• Lensing and CMB Anisotropies by Cosmic Strings at a Junction
• A Convolutional Neural Network For Cosmic String Detection in CMB Temperature Maps
• 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
• The 21cm Signature of a Cosmic String Loop
• Searching for Signatures of Cosmic Superstrings in the CMB
• Searching for Signatures of Cosmic String Wakes in 21cm Redshift Surveys using Minkowski Functionals
• Analytical Study of Mode Coupling in Hybrid Inflation
• Dark Matter Distribution Induced by a Cosmic String Wake in the Nonlinear Regime
• Disruption of Cosmic String Wakes by Gaussian Fluctuations
• Extracting the Signal of Cosmic String Wakes from 21-cm Observations
• On the Possible Enhancement of the Global $21$-cm Signal at Reionization from the Decay of Cosmic String Cusps
• Note on Structure Formation from Cosmic String Wakes
• Cosmic Strings and the Origin of Globular Clusters
• Information Theoretic Bounds on Cosmic String Detection in CMB Maps with Noise
• The bispectrum of cosmic string temperature fluctuations including recombination effects
• Cosmic Strings and Weak Gravitational Lensing
• 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
• Cosmic Strings-induced CMB anisotropies in light of Weighted Morphology
• Angular Power Spectrum of B-mode Polarization from Cosmic String Wakes
• Canny Algorithm: A New Estimator for Primordial Non-Gaussianities