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Scientific optimization of a ground-based CMB polarization experiment

Bowden, M. and Taylor, A. N. and Ganga, K. M. and Ade, P. A. R. and Bock, J. J. and Cahill, G. and Carlstrom, J. E. and Church, S. E. and Gear, W. K. and Hinderks, J. R. and Hu, W. and Keating, B. G. and Kovac, J. and Lange, A. E. and Leitch, E. M. and Maffei, B. and Mallie, O. E. and Melhuish, S. J. and Murphy, J. A. and Pisano, G. and Piccirillo, L. and Pryke, C. and Rusholme, B. A. and O'Sullivan, C. and Thompson, K. (2004) Scientific optimization of a ground-based CMB polarization experiment. Monthly Notices of the Royal Astronomical Society, 349 (1). pp. 321-335. ISSN 1365-2966. doi:10.1111/j.1365-2966.2004.07506.x.

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We investigate the science goals achievable with the upcoming generation of ground-based cosmic microwave background polarization experiments, focusing on one particular experiment, QUaD [QUEST (Q and U Extragalactic Submillimetre Telescope) and DASI (Degree Angular Scale Interferometer)], a proposed bolometric polarimeter operating from the South Pole. We calculate the optimal sky coverage for this experiment, including the effects of foregrounds and gravitational lensing. We find that an E-mode measurement will be sample-limited, whereas a B-mode measurement will be detector-noise-limited. We conclude that a 300 deg² survey is an optimal compromise for a 2-yr experiment to measure both E and B modes, and that a ground-based polarization experiment can make an important contribution to B-mode surveys. QUaD can make a high significance measurement of the acoustic peaks in the E-mode spectrum, over a multipole range of 25 < ℓ < 2500, and will be able to detect the gravitational lensing signal in the B-mode spectrum. Such an experiment could also directly detect the gravitational wave component of the B-mode spectrum if the amplitude of the signal is close to current upper limits. We also investigate how QUaD can improve constraints on the cosmological parameters. We estimate that combining two years of QUaD data with the 4-yr Wilkinson Microwave Anisotropy Probe (WMAP) data can improve constraints on Ω_bh², Ω_mh², h, r and n_s by a factor of 2. If the foreground contamination can be reduced, the measurement of r can be improved by up to a factor of 6 over that obtainable from WMAP alone. These improved accuracies will place strong constraints on the potential of the inflaton field.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Ade, P. A. R.0000-0002-5127-0401
Bock, J. J.0000-0002-5710-5212
Carlstrom, J. E.0000-0002-2044-7665
Additional Information:© 2004 RAS. Accepted 2003 December 3. Received 2003 December 1; in original form 2003 August 26. Published: 21 March 2004. MB would like to acknowledge a departmental grant from the University of Wales, Cardiff. ANT thanks the PPARC for an Advanced Research Fellowship. The US contribution to this work is supported by the National Science Foundation under grants 9987360 and 0096778.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
University of WalesUNSPECIFIED
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
Subject Keywords:polarization – methods: observational – techniques: polarimetric – cosmic microwave background – cosmological parameters
Issue or Number:1
Record Number:CaltechAUTHORS:20200130-075505900
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Official Citation:M. Bowden, A. N. Taylor, K. M. Ganga, P. A. R. Ade, J. J. Bock, G. Cahill, J. E. Carlstrom, S. E. Church, W. K. Gear, J. R. Hinderks, W. Hu, B. G. Keating, J. Kovac, A. E. Lange, E. M. Leitch, B. Maffei, O. E. Mallie, S. J. Melhuish, J. A. Murphy, G. Pisano, L. Piccirillo, C. Pryke, B. A. Rusholme, C. O'Sullivan, K. Thompson, Scientific optimization of a ground-based CMB polarization experiment, Monthly Notices of the Royal Astronomical Society, Volume 349, Issue 1, March 2004, Pages 321–335,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:100998
Deposited By: Tony Diaz
Deposited On:30 Jan 2020 19:16
Last Modified:16 Nov 2021 17:58

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