IMPROVED MEASUREMENTS OF THE TEMPERATURE AND POLARIZATION OF THE COSMIC MICROWAVE BACKGROUND FROM QUaD

被引：213

作者：

Brown, M. L. ^{[1
,2
]}

Ade, P. ^{[3
]}

Bock, J. ^{[4
,5
]}

Bowden, M. ^{[3
,6
,7
]}

Cahill, G. ^{[8
]}

Castro, P. G. ^{[9
]}

Church, S. ^{[6
,7
]}

Culverhouse, T. ^{[10
]}

Friedman, R. B. ^{[10
]}

Ganga, K. ^{[11
]}

Gear, W. K. ^{[3
]}

Gupta, S. ^{[3
]}

Hinderks, J. ^{[6
,7
]}

Kovac, J. ^{[5
]}

Lange, A. E. ^{[5
]}

Leitch, E. ^{[4
,5
]}

Melhuish, S. J. ^{[12
]}

Memari, Y. ^{[9
]}

Murphy, J. A. ^{[8
]}

Orlando, A. ^{[3
,5
]}

Sullivan, C. O' ^{[8
]}

Piccirillo, L. ^{[12
]}

Pryke, C. ^{[10
]}

Rajguru, N. ^{[3
]}

Rusholme, B. ^{[6
,7
]}

Schwarz, R. ^{[10
]}

Taylor, A. N. ^{[9
]}

Thompson, K. L. ^{[6
,7
]}

Turner, A. H. ^{[3
]}

Wu, E. Y. S. ^{[6
,7
]}

Zemcov, M. ^{[3
,4
,5
]}

机构：

[1] Univ Cambridge, Cavendish Astrophys, Cambridge CB3 OHE, England

[2] Kavli Inst Cosmol Cambridge, Cambridge CB3 OHA, England

[3] Cardiff Univ, Sch Phys & Astron, Cardiff CF24 3AA, S Glam, Wales

[4] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA

[5] CALTECH, Pasadena, CA 91125 USA

[6] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA

[7] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[8] Natl Univ Ireland Maynooth, Dept Expt Phys, Maynooth, Kildare, Ireland

[9] Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland

[10] Univ Chicago, Dept Astron & Astrophys, Enrico Fermi Inst, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[11] Univ Paris 07, APC, CNRS, F-75205 Paris 13, France

[12] Univ Manchester, Sch Phys & Astron, Manchester M13 9PL, Lancs, England

来源：

ASTROPHYSICAL JOURNAL | 2009年 / 705卷 / 01期

关键词：

cosmic microwave background; cosmological parameters; cosmology: observations; polarization; PROBE WMAP OBSERVATIONS; POWER SPECTRUM; 2003; FLIGHT; COSMOLOGICAL PARAMETERS; BOOMERANG; MAPS; ANISOTROPIES; DESIGN; IMAGER; CAPMAP;

D O I：

10.1088/0004-637X/705/1/978

中图分类号：

P1 [天文学];

学科分类号：

070403 [天体物理学];

摘要：

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.).

引用

页码：978 / 999

页数：22

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