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Title:
Parameter Estimation from Improved Measurements of the CMB from QUaD
Authors:
QUaD collaboration; 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.
Publication:
eprint arXiv:0909.1621
Publication Date:
09/2009
Origin:
ARXIV
Keywords:
Astrophysics - Cosmology and Extragalactic Astrophysics
Comment:
11 pages, 7 figures, submitted to ApJ
Bibliographic Code:
2009arXiv0909.1621Q

Abstract

We evaluate the ability of cosmic microwave background (CMB) polarization spectra to constrain cosmological models by analyzing a multi-experiment CMB dataset including the final analysis of the QUaD experiment. We provide the best limits on parameters from combined polarization data and find that QUaD spectra combined with additional CMB datasets using the optimal pivot scale of k_p=0.013 Mpc-1 prefer standard LCDM parameters of {omch2, ombh2, H_0, A_s, n_s, tau}={0.113, 0.0224, 70.6, 2.29 times 10^-9, 0.960, 0.086}, with the confidence regions of ombh2, omch2 and H_0 tightened due to the presence of QUaD data. QUaD alone constrains cold dark matter and baryon densities and the acoustic scale very well. The temperature and polarization sub-sets each provide good limits on cosmological parameters which are consistent with values obtained from a combination of existing CMB data. We incorporate small-scale CMB data to provide the tightest constraint on tensor modes from CMB data alone.
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