HAL : hal-00736880, version 1

arXiv : 0909.1621

Code Bibliographique ADS : 2010ApJ...716.1040G

DOI : 10.1088/0004-637X/716/2/1040

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Astrophysical Journal 716 (2010) 1040-1046

Parameter Estimation from Improved Measurements of the Cosmic Microwave Background from QUaD

S. Gupta, P. Ade, J. Bock, M. Bowden, M. L. Brown, G. Cahill, P. G. Castro, S. Church, T. Culverhouse, R. B. Friedman, K. Ganga1, W. K. Gear, J. Hinderks, J. Kovac, A. E. Lange, E. Leitch, S. J. Melhuish, Y. Memari, J. A. Murphy, A. Orlando, C. O'Sullivan, L. Piccirillo, C. Pryke, N. Rajguru, B. Rusholme, R. Schwarz, A. N. Taylor, K. L. Thompson, A. H. Turner, E. Y. S. Wu, M. Zemcov

QUaD Collaboration(s)

(06/2010)

We evaluate the contribution of cosmic microwave background (CMB) polarization spectra to cosmological parameter constraints. We produce cosmological parameters using high-quality CMB polarization data from the ground-based QUaD experiment and demonstrate for the majority of parameters that there is significant improvement on the constraints obtained from satellite CMB polarization data. We split a multi-experiment CMB data set into temperature and polarization subsets and show that the best-fit confidence regions for the ΛCDM six-parameter cosmological model are consistent with each other, and that polarization data reduces the confidence regions on all parameters. We provide the best limits on parameters from QUaD EE/BB polarization data and we find best-fit parameters from the multi-experiment CMB data set using the optimal pivot scale of kp = 0.013 Mpc-1 to be {h 2Ω c , h 2Ω b , H 0, As , ns , τ} = {0.113, 0.0224, 70.6, 2.29 × 10-9, 0.960, 0.086}.

1 :	APC - AstroParticule et Cosmologie

équipe(s) de recherche : APC - Cosmologie et Gravitation

Domaine

:

Planète et Univers/Astrophysique/Cosmologie et astrophysique extra-galactique Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Mots Clés : cosmic background radiation – cosmological parameters

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Contributeur : Alina Deniau <>

Soumis le : Dimanche 30 Septembre 2012, 15:37:02

Dernière modification le : Dimanche 30 Septembre 2012, 15:38:51