Galactic foregrounds and CMB polarization

Details Galactic foregrounds and CMB polarization Galactic foregrounds and CMB polarization

2010-08-30

arxiv.org/abs/1008.4983v1

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

13 pages, 10 figures, to appear in "The Dynamic ISM: A celebration of the Canadian Galactic Plane Survey," ASP Conference Seri

Scientific paper

The CMB polarization promises to unveil the dawn of time measuring the gravitational wave background emitted by the Inflation. The CMB signal is faint, however, and easily contaminated by the Galactic foreground emission, accurate measurements of which are thus crucial to make CMB observations successful. We review the CMB polarization properties and the current knowledge on the Galactic synchrotron emission, which dominates the foregrounds budget at low frequency. We then focus on the S-Band Polarization All Sky Survey (S-PASS), a recently completed survey of the entire southern sky designed to investigate the Galactic CMB foreground.

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