Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1780178 | New Astronomy Reviews | 2007 | 8 Pages |
Abstract
BOOMERanG is a balloon-borne, mm-wave scanning telescope, which measured the first images of the CMB with sub-horizon resolution in 1998. In 2003 the instrument has been flown again with polarization sensitive bolometers, and has produced maps of the Stokes parameters I, Q, U of the microwave sky. Three regions of the southern sky were surveyed: a deep (â¼90 square degrees) and a shallow survey (â¼750 square degrees) at high Galactic latitudes, and a survey of â¼300 square degrees across a southern section of the Galactic plane. The experiment measured simultaneously three wide frequency bands centered at 145, 245 and 345Â GHz, with an angular resolution of â¼10â². The 145Â GHz temperature maps are dominated by Cosmic Microwave Background (CMB) anisotropy, which is mapped with high signal to noise ratio. The map is consistent with the pattern measured in the same region by BOOMERanG-98 and by WMAP. At 145Â GHz, in the high latitude surveys, the intensity and polarization of the astrophysical foregrounds are found to be negligible with respect to the cosmological signal. At 245 and 345Â GHz we detect ISD emission correlated to the 3000Â GHz IRAS/DIRBE maps. The Q and U maps at high latitudes are dominated by detector noise: a power spectrum analysis allows us to extract from the maps a significant CMB polarization signal.
Keywords
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Astronomy and Astrophysics
Authors
S. Masi, P.A.R. Ade, J.J. Bock, J.R. Bond, J. Borrill, A. Boscaleri, P. Cabella, C.R. Contaldi, B.P. Crill, P. de Bernardis, G. De Gasperis, A. De Oliveira-Costa, G. De Troia, G. Di Stefano, P. Ehlers, E. Hivon, V. Hristov, A. Iacoangeli, N. Vittorio,