ARCADE - Measuring deviations from blackbody in the CMB absolute spectrum

Details ARCADE - Measuring deviations from blackbody in the CMB absolute spectrum ARCADE - Measuring deviations from blackbody in the CMB absolute spectrum

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20512305s&link_type=abstract

American Astronomical Society Meeting 205, #123.05; Bulletin of the American Astronomical Society, Vol. 36, p.1552

Astronomy and Astrophysics

Astronomy

Scientific paper

The ARCADE project is a balloon-based instrument measuring the radiometric temperature of the CMB at frequencies as low as 3 GHz, where deviations in the absolute spectrum from that of a blackbody are expected to exist. A measurement of such a distortion could constrain models of clumping in low redshift galactic halos, and possibly the extent of non-equilibrium conditions in the early universe which would result from decays or annihilations of exotic particles.
A prototype experiment demonstrating the novel cryogenic design flew in June, 2003. I will present the results from that flight, which performed a measurement at 10 and 30 GHz, and discuss the payload under development which will observe at selection of frequencies from 3 to 90 GHz.

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