Cosmological Parameters from CMB measurements with the CBI

Details Cosmological Parameters from CMB measurements with the CBI Cosmological Parameters from CMB measurements with the CBI

2002-08-22

arxiv.org/abs/astro-ph/0208410v2

Astronomy and Astrophysics

Astrophysics

4 pages, To appear in the Proceedings of the XXXVIIth Moriond Astrophysics Meeting "The Cosmological Model"

Scientific paper

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 $\Omega_{\rm tot}=1$ $\Lambda$CDM model within the adiabatic, inflationary paradigm. Above $\ell=2000$ 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 $\sigma_8\sim 1$ which is in the high end of the range allowed by the primary CMB observations.

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