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

Gupta, S. and Ade, P. and Bock, J. and Bowden, M. and Brown, M.L. and Cahill, G. and Castro, P.G. and Church, S. and Culverhouse, T. and Friedman, R.B. and Ganga, K. and Gear, W.K. and Hinderks, J. and Kovac, J. and Lange, A.E. and Leitch, E. and Melhuish, S.J. and Memari, Y. and Murphy, J.A. and Orlando, A. and O'Sullivan, C. and Piccirillo, L. and Pryke, C. and Rajguru, N. and Rusholme, B. and Schwarz, R. and Taylor, A.N. and Thompson, K.L. and Turner, A.H. and Wu, E.Y.S. and Zemcov, M. (2010) Parameter Estimation from Improved Measurements of the Cosmic Microwave Background from QUAD. Astrophysical Journal Supplement, 716 (2). pp. 1040-1046. ISSN 0067-0049

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Abstract

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 _CDMsix-parameter cosmologicalmodel 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 {h2Ωc, h2Ωb, H0, As, ns,Г}={0.113, 0.0224, 70.6, 2.29×10-9, 0.960, 0.086}.

Item Type: Article
Additional Information: Preprint version of the original published article, which is available at doi:10.1088/0004-637X/716/2/1040.
Keywords: QUAD Collaboration; CMB; anisotropy; polarization; cosmology; cosmological parameters;
Subjects: Science & Engineering > Experimental Physics
Item ID: 4029
Depositing User: Dr. Anthony Murphy
Date Deposited: 11 Dec 2012 16:25
Journal or Publication Title: Astrophysical Journal Supplement
Publisher: Institute of Physics
Refereed: Yes
URI:

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