Peer-Reviewed Journal Details
Mandatory Fields
Brown, ML;Ade, P;Bock, J;Bowden, M;Cahill, G;Castro, PG;Church, S;Culverhouse, T;Friedman, RB;Ganga, K;Gear, WK;Gupta, S;Hinderks, J;Kovac, J;Lange, AE;Leitch, E;Melhuish, SJ;Memari, Y;Murphy, JA;Orlando, A;Sullivan, CO;Piccirillo, L;Pryke, C;Rajguru, N;Rusholme, B;Schwarz, R;Taylor, AN;Thompson, KL;Turner, AH;Wu, EYS;Zemcov, M
2009
November
Astrophysical Journal
IMPROVED MEASUREMENTS OF THE TEMPERATURE AND POLARIZATION OF THE COSMIC MICROWAVE BACKGROUND FROM QUaD
Published
196 ()
Optional Fields
PROBE WMAP OBSERVATIONS POWER SPECTRUM 2003 FLIGHT COSMOLOGICAL PARAMETERS BOOMERANG MAPS ANISOTROPIES DESIGN IMAGER CAPMAP
705
978
999
We present an improved analysis of the final data set from the QUaD experiment. Using an improved technique to remove ground contamination, we double the effective sky area and hence increase the precision of our cosmic microwave background (CMB) power spectrum measurements by similar to 30% versus that previously reported. In addition, we have improved our modeling of the instrument beams and have reduced our absolute calibration uncertainty from 5% to 3.5% in temperature. The robustness of our results is confirmed through extensive jackknife tests, and by way of the agreement that we find between our two fully independent analysis pipelines. For the standard six-parameter Lambda CDM model, the addition of QUaD data marginally improves the constraints on a number of cosmological parameters over those obtained from the WMAP experiment alone. The impact of QUaD data is significantly greater for a model extended to include either a running in the scalar spectral index, or a possible tensor component, or both. Adding both the QUaD data and the results from the Arcminute Cosmology Bolometer Array Receiver experiment, the uncertainty in the spectral index running is reduced by similar to 25% compared to WMAP alone, while the upper limit on the tensor-to-scalar ratio is reduced from r < 0.48 tor < 0.33 (95% c. l.). This is the strongest limit on tensors to date from the CMB alone. We also use our polarization measurements to place constraints on parity-violating interactions to the surface of last scattering, constraining the energy scale of Lorentz violating interactions to < 1.5 x 10(-43) GeV (68% c.l.). Finally, we place a robust upper limit on the strength of the lensing B-mode signal. Assuming a single flat band power between l = 200 and l = 2000, we constrain the amplitude of B-modes to be < 0.57 mu K-2 (95% c.l.).
BRISTOL
0004-637X
10.1088/0004-637X/705/1/978
Grant Details