Edge Detection, Cosmic Strings and the South Pole Telescope

Abstract

We develop a method of constraining the cosmic string tension $G\mu$ which uses the Canny edge detection algorithm as a means of searching CMB temperature maps for the signature of the Kaiser-Stebbins effect. We test the potential of this method using high resolution, simulated CMB temperature maps. By modeling the future output from the South Pole Telescope project (including anticipated instrumental noise), we find that cosmic strings with $G\mu >5.5\times 10^{-8}$ could be detected.

27 pages, 5 figures, reference and minor notes added, discussion of noise expanded, explanation of equation (4) expanded

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• Canny Algorithm, Cosmic Strings and the Cosmic Microwave Background
• Searching for Cosmic Strings in New Observational Windows
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• String Gas Cosmology after Planck
• Searching for Cosmic Strings in CMB Anisotropy Maps using Wavelets and Curvelets
• Wavelet-Bayesian inference of cosmic strings embedded in the cosmic microwave background
• Unconventional Cosmology
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• A Convolutional Neural Network For Cosmic String Detection in CMB Temperature Maps
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• Direct Observation of Cosmic Strings via their Strong Gravitational Lensing Effect: II. Results from the HST/ACS Image Archive
• Angular 21 cm Power Spectrum of a Scaling Distribution of Cosmic String Wakes
• Multi-Scale Pipeline for the Search of String-Induced CMB Anisotropies
• The 21cm Signature of a Cosmic String Loop
• Level Crossing Analysis of Cosmic Microwave Background Radiation: A method for detecting cosmic strings
• Searching for Signatures of Cosmic String Wakes in 21cm Redshift Surveys using Minkowski Functionals
• Searching for Signatures of Cosmic Superstrings in the CMB
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• Analytical Study of Mode Coupling in Hybrid Inflation
• Disruption of Cosmic String Wakes by Gaussian Fluctuations
• Cosmic String Detection with Tree-Based Machine Learning
• On the Possible Enhancement of the Global $21$-cm Signal at Reionization from the Decay of Cosmic String Cusps
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• Note on Structure Formation from Cosmic String Wakes
• Information Theoretic Bounds on Cosmic String Detection in CMB Maps with Noise
• Probing Particle Physics from Top Down with Cosmic Strings
• 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
• Canny Algorithm: A New Estimator for Primordial Non-Gaussianities