We report measurements of the CMB polarization power spectra from the 2003 January Antarctic flight of BOOMERANG. The primary results come from 6 days of observation of a patch covering 0.22% of the sky centered near R.A.=82.5d, decl.=-45deg. The observations were made using four pairs of polarization-sensitive bolometers operating in bands centered at 145 GHz. Using two independent analysis pipelines, we measure a nonzero <EE> signal in the range 201<l<1000 with a significance of 4.8 σ, a 2 σ upper limit of 8.6 μK2 for any <BB> contribution, and a 2 σ upper limit of 7.0 μK2 for the <EB> spectrum. Estimates of foreground intensity fluctuations and the nondetection of <BB> and <EB> signals rule out any significant contribution from Galactic foregrounds. The results are consistent with a ΛCDM cosmology seeded by adiabatic perturbations. We note that this is the first detection of CMB polarization with bolometric detectors.
A Measurement of the CMB EE Spectrum from the 2003 Flight of BOOMERANG
NATOLI, Paolo;
2006
Abstract
We report measurements of the CMB polarization power spectra from the 2003 January Antarctic flight of BOOMERANG. The primary results come from 6 days of observation of a patch covering 0.22% of the sky centered near R.A.=82.5d, decl.=-45deg. The observations were made using four pairs of polarization-sensitive bolometers operating in bands centered at 145 GHz. Using two independent analysis pipelines, we measure a nonzeroI documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
