Cosmological Parameters from the Microwave Background and Large-Scale Structure

Details Cosmological Parameters from the Microwave Background and Large-Scale Structure Cosmological Parameters from the Microwave Background and Large-Scale Structure

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003idm..conf....1p&link_type=abstract

THE IDENTIFICATION OF DARK MATTER. Proceedings of the Fourth International Workshop. Held 2 - 6 September 2002 in York, UK. Edit

Physics

Cosmic Microwave Background, Universe: Large Scale Structure

Scientific paper

A brief overview is given of the mechanisms that generate CMB anisotropies, concentrating on the model degeneracies intrinsic to CMB data alone. These degeneracies are broken by the addition of LSS information, resulting in a well-specified model. Spatial curvature must be low, with |Ω - 1| < 0.05 at 95% confidence. If the universe is exactly flat, the CMB power spectrum measures the combination Ωmh3 = 0.092 ± 6%. Adding LSS data also breaks this degeneracy, requiring Ωm = 0.26 ± 15% and h = 0.71 ± 6%. The preferred model is scalar-dominated, although a substantial tensor contribution is hard to rule out without a precise measurement of the amplitude of mass fluctuations. The prospects for further tests and refinements of this picture are discussed.

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