A Cosmic Microwave Background feature consistent with a cosmic texture

Details A Cosmic Microwave Background feature consistent with a cosmic texture A Cosmic Microwave Background feature consistent with a cosmic texture

2007-10-30

arxiv.org/abs/0710.5737v1

Science 318:1612-1614,2007

Astronomy and Astrophysics

Astrophysics

Accepted by Science. Published electronically via Science Express on 25 October 2007, http://www.sciencemag.org/cgi/content/ab

Scientific paper

10.1126/science.1148694

The Cosmic Microwave Background provides our most ancient image of the Universe and our best tool for studying its early evolution. Theories of high energy physics predict the formation of various types of topological defects in the very early universe, including cosmic texture which would generate hot and cold spots in the Cosmic Microwave Background. We show through a Bayesian statistical analysis that the most prominent, 5 degree radius cold spot observed in all-sky images, which is otherwise hard to explain, is compatible with having being caused by a texture. From this model, we constrain the fundamental symmetry breaking energy scale to be phi_0 ~ 8.7 x 10^(15) GeV. If confirmed, this detection of a cosmic defect will probe physics at energies exceeding any conceivable terrestrial experiment.

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