Cosmological Parameters from CMB measurements with the CBI
C. R. Contaldi, J. R. Bond, D. Pogosyan, B. S. Mason, S. T. Myers, T. J. Pearson, U. L. Pen, S. Prunet, A. C. Readhead, M. I. Ruetalo, J. L. Sievers, J. W. Wadsley, P. J. Zhang
Abstract
We derive cosmological parameters from the CBI measurements of the Cosmic Microwave Background (CMB) angular power spectrum. Our results provide an independent confirmation of the standard Ω tot=1 ΛCDM model within the adiabatic, inflationary paradigm. Above =2000 the observations show evidence of power in excess of that expected in the standard models. We use hydrodynamical simulations to show how Sunyaev-Zeldovich Effect (SZE) may account for the excess power for models with fluctuation amplitude σ8 1 which is in the high end of the range allowed by the primary CMB observations.
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