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

June 2010 • 2010ApJ...716.1040G

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

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 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 k_p = 0.013 Mpc^-1 to be {h ²Ω _c , h ²Ω _b , H ₀, A_s , n_s , τ} = {0.113, 0.0224, 70.6, 2.29 × 10^-9, 0.960, 0.086}.

Links

• PDF https://iopscience.iop.org/article/10.1088/0004-637X/716/2/1040/pdf
• PDF https://stacks.iop.org/0004-637X/716/1040/pdf
• PREPRINT http://arxiv.org/abs/0909.1621
• ELECTR https://doi.org/10.1088%2F0004-637X%2F716%2F2%2F1040
• SPIRES http://inspirehep.net/search?p=find+eprint+arXiv:0909.1621