$\Pi$ in the Sky ? Microwave Anisotropies from Cosmic Defects

Abstract

High resolution maps of the anisotropy of the microwave sky will yield invaluable clues as to the mechanisms involved in cosmic structure formation. One fundamental question they should answer is whether the fluctuations were Gaussian random noise, as predicted in inflationary models, or were nonGaussian as in theories based on symmetry breaking and cosmic defects. In the latter case there is the prospect of obtaining information regarding symmetry breaking at high energy scales, specifically the homotopy classes ${\Pi }_n$ of the vacuum manifold. In this paper we report on detailed calculations of the degree scale anisotropies predicted in the cosmic string, monopole texture and nontopological texture theories of structure formation, emphasising their distinct character from those predicted by inflation, and the bright prospects for experimental tests.

13 pages, TeX, Colour Figures available by anonymous ftp (color postscript files), PUP-TH-93/1429

References in corpus (2)

• The Imprint of Gravitational Waves on the Cosmic Microwave Background
• COBE's Constraints on the Global Monopole and Texture Theories of Cosmic Structure Formation

Cited by in corpus (49)

• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• Cosmic strings
• Big Bang nucleosynthesis and physics beyond the Standard Model
• The Physics of Microwave Background Anisotropies
• Power Spectra in Global Defect Theories of Cosmic Structure Formation
• The Effect of Physical Assumptions on the Calculation of Microwave Background Anisotropies
• Bounds on Cosmic Strings from WMAP and SDSS
• Causality, randomness, and the microwave background
• CMB Anisotropy Induced by Cosmic Strings on Angular Scales $>15^{\prime }$
• From Microwave Anisotropies to Cosmology
• The performance of spherical wavelets to detect non-Gaussianity in the CMB sky
• Scaling and Small Scale Structure in Cosmic String Networks
• The power spectra of CMB and density fluctuations seeded by local cosmic strings
• A detail study of defect models for cosmic structure formation
• Tests and problems of the standard model in Cosmology
• Polarization and Anisotropy of the Microwave Sky
• Large Angle CMB Fluctuations from Cosmic Strings with a Comological Constant
• Large Angular Scale CMB Anisotropy Induced by Cosmic Strings
• Some aspects of thermal inflation: the finite temperature potential and topological defects
• The Small Scale Integrated Sachs-Wolfe Effect
• The structure of Doppler peaks induced by active perturbations
• The Doppler Peaks from Cosmic Texture
• Correlations in Cosmic String Networks
• Large Scale Structure Formation with Global Topological Defects. A new Formalism and its implementation by numerical simulations
• Fluctuations in the CMB Induced by Cosmic Strings: Methods and Formalism
• First Structure Formation: II. Cosmic String + Hot Dark Matter Models
• The closet non-Gaussianity of anisotropic Gaussian fluctuations
• Sub-degree Scale Microwave Anisotropies from Cosmic Defects
• Non-Gaussian Spectra
• Dynamical behavior of the $C$-metric: charged scalar fields, quasinormal modes and superradiance
• Distributions of Fourier Modes of Cosmological Density Fields
• On the inverse problem of finding cosmic strings and other topological defects
• Cosmic Microwave Background non-Gaussian signatures from analytical texture models
• Peaks in the CMBR power spectrum. II. Physical interpretation for any cosmological scenario
• Leptogenesis from reheating after inflation and cosmic string decay
• Friction Domination with Superconducting Strings
• High Harmonic Configurations of Cosmic Strings: An Analysis of Self-Intersections
• Texture-Induced Microwave Background Anisotropies
• Peak-peak correlations in the cosmic background radiation from cosmic strings
• Cosmic Microwave Anisotropies from Topological Defects in an Open Universe
• Non-Gaussian CMBR angular power spectra
• Cosmic Strings in an Open Universe with Baryonic and Non-Baryonic Dark Matter
• Some doubts on the validity of the foreground Galactic contribution subtraction from microwave anisotropies
• Structure Formation in the Universe from Texture Induced Fluctuation
• Numerical Methods in Cosmological Global Texture Simulations
• Cosmological Perturbations from Cosmic Strings
• Searching for Long Strings in CMB Maps
• Power Fluctuations in the Wavelet Space: Large-Scale CMB Non-Gaussian Statistics
• Cosmic Microwave Background Radiation Anisotropy Induced by Cosmic Strings