$Π$ in the Sky ? Microwave Anisotropies from Cosmic Defects

Details $Π$ in the Sky ? Microwave Anisotropies from Cosmic Defects $Π$ in the Sky ? Microwave Anisotropies from Cosmic Defects

1993-10-20

arxiv.org/abs/hep-ph/9310322v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1038/368027a0

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.

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