Degree Angular Scale Interferometer 3 Year Cosmic Microwave Background Polarization Results

By E. Leitch, J. Kovac, N. Halverson, J. Carlstrom, C. Pryke, M. Smith. 2004

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We present the analysis of the complete 3 yr data set obtained with the Degree Angular Scale Interferometer (DASI) polarization experiment, operating from the Amundsen-Scott South Pole research station. New data obtained at the end of the 2002 austral winter and throughout the 2003 season were added to the data from which the first detection of polarization of the cosmic microwave background (CMB) radiation was reported. The analysis of the combined data supports, with increased statistical power, all of the conclusions drawn from the initial data set. In particular, the detection of E-mode polarization is increased to the 6.3 σ confidence level, TE cross-polarization is detected at 2.9 σ, and B-mode polarization is consistent with zero, with an upper limit well below the level of the detected E-mode polarization. The results are in excellent agreement with the predictions of the cosmological model that has emerged from CMB temperature measurements. The analysis also demonstrates that contamination of the data by known sources of foreground emission is insignificant.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/6324b097fcf3a357fb9427e991827f27a73e5d65

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Citations in the corpus

HIGH-RESOLUTION CMB POWER SPECTRUM FROM THE COMPLETE ACBAR DATA SET (2008, background): “…combined in the manner described in Sievers et al. (2005) ; 16 the DASI two year results (Halverson et al. 2002 ); the DASI EE and TE band-powers (Leitch et al. 2005); the VSA final results (Dickinson et al. 2004); the MAXIMA 1998 flight results (Hanany et al. 2000); and the TT, TE, and EE…”
FIVE-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE OBSERVATIONS: ANGULAR POWER SPECTRA (2008, result): “The 5-year high-ℓ EE spectrum is shown in Figure 10, along with recent results from ground-based experiments (Leitch et al. 2005; Montroy et al. 2006; Sievers et al. 2007).”
A MEASUREMENT OF THE COSMIC MICROWAVE BACKGROUND B-MODE POLARIZATION POWER SPECTRUM AT SUB-DEGREE SCALES WITH POLARBEAR (2014, background): “These measurements are consistent with a single source for both the temperature and E-mode signals – the adiabatic density fluctuations in the primordial universe (Barkats et al. 2014; Leitch et al. 2005; Montroy et al. 2006; Brown et al. 2009; quiet Collaboration 2011, 2012; Bennett et al. 2013).”
Three Year Wilkinson Microwave Anistropy Probe (WMAP) Observations: Polarization Analysis (2006, background): “Other detections of TE atℓ > 100 have been reported by DASI (2.9σ) (Leitch et al. 2005), Boomerang (3.5σ) (Piacentini et al. 2005), and CBI (3.3σ) (Sievers et al. 2005).”
MEASUREMENT OF COSMIC MICROWAVE BACKGROUND POLARIZATION POWER SPECTRA FROM TWO YEARS OF BICEP DATA (2009, methodology): “E-mode polarization was first detected by DASI (Kovac et al. 2002) and has since been measured by many other experiments (Leitch et al. 2005; Montroy et al. 2006; Sievers et al. 2007; Wu et al. 2007; Bischoff et al. 2008).”
Three-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Implications for Cosmology (2006, unknown): “…of the 2dFGRS (Cole et al. 2005); improvements in small-scale CMB measurements ( Kuo et al. 2004; Readhead et al. 2004a, 2004b; Grainge et al. 2003; Leitch et al. 2005; Piacentini et al. 2006; Montroy et al. 2006; O'Dwyer et al. 2005); much larger samples of highredshift supernova (Riess et…”