Searching for Cosmic Strings in CMB Anisotropy Maps using Wavelets and Curvelets

Abstract

We use wavelet and curvelet transforms to extract signals of cosmic strings from cosmic microwave background (CMB) temperature anisotropy maps, and to study the limits on the cosmic string tension which various ongoing CMB temperature anisotropy experiments will be able to achieve. We construct sky maps with size and angular resolution corresponding to various experiments. These maps contain the signals of a scaling solution of long string segments with a given string tension $G\mu$, the contribution of the dominant Gaussian primordial cosmological fluctuations, and pixel by pixel white noise with an amplitude corresponding to the instrumental noise of the various experiments. In the case that we include white noise, we find that the curvelets are more powerful than wavelets. For maps with Planck specification, we obtain bounds on the string tension comparable to what was obtained by the Planck collaboration. Experiments with better angular resolution such as the South Pole Telescope third generation (SPT-3G) survey will be able to yield stronger limits. For maps with a specification of SPT-3G we find that string signals will be visible down to a string tension of $G\mu =1.4\times 10^{-7}$.

13 pages, 7 figures, 3 tables

References in corpus (8)

• CMB power spectrum contribution from cosmic strings using field-evolution simulations of the Abelian Higgs model
• CMB constraints on cosmic strings and superstrings
• SPTpol: an instrument for CMB polarization measurements with the South Pole Telescope
• Analytic Study of Small Scale Structure on Cosmic Strings
• Detecting Cosmic Strings in the CMB with the Canny Algorithm
• Constraints on Brane Inflation and Cosmic Strings
• All sky CMB map from cosmic strings integrated Sachs-Wolfe effect
• Observational Constraints on Varying-alpha Domain Walls

Cited by in corpus (23)

• Ultrahigh frequency primordial gravitational waves beyond the kHz: The case of cosmic strings
• Intermediate Mass Black Hole Seeds from Cosmic String Loops
• Moving groups across Galactocentric radius with Gaia DR3
• Massive black holes at high redshifts from superconducting cosmic strings
• A Bayesian Framework for Cosmic String Searches in CMB Maps
• A Convolutional Neural Network For Cosmic String Detection in CMB Temperature Maps
• Dynamical behavior of the $C$-metric: charged scalar fields, quasinormal modes and superradiance
• 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 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
• Information Theoretic Bounds on Cosmic String Detection in CMB Maps with Noise
• Ridges in the Dark Energy Survey for cosmic trough identification
• Magnetic solutions in Einstein-massive gravity with linear and nonlinear fields
• The wiggly cosmic string as a waveguide for massless and massive fields
• 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
• Investigating cosmic strings using large-volume hydrodynamical simulations in the context of JWST's massive UV-bright galaxies
• The Global 21 cm Signal of a Network of Cosmic String Wakes
• A viable D-term hybrid inflation
• Cosmic Strings-induced CMB anisotropies in light of Weighted Morphology
• Probing cosmic strings via gravitational-wave lensing
• Edge detection with polynomial frames on the sphere