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

Cosmological Parameters from CMB measurements with the CBI

Astrophysics 2007-05-23 v2

Authors: 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

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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 $\Omega_{\rm tot}=1$ $\Lambda$ 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.

Keywords

cosmological parameters cosmic microwave background CBI Sunyaev-Zeldovich effect $\Lambda$CDM model inflationary paradigm

Cite

@article{arxiv.astro-ph/0208410,
  title  = {Cosmological Parameters from CMB measurements with the CBI},
  author = {C. R. Contaldi and J. R. Bond and D. Pogosyan and B. S. Mason and S. T. Myers and T. J. Pearson and U. L. Pen and S. Prunet and A. C. Readhead and M. I. Ruetalo and J. L. Sievers and J. W. Wadsley and P. J. Zhang},
  journal= {arXiv preprint arXiv:astro-ph/0208410},
  year   = {2007}
}

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

Cosmological Parameters from CMB measurements with the CBI

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