Detection of anisotropy in the cosmic blackbody radiation

Details Detection of anisotropy in the cosmic blackbody radiation Detection of anisotropy in the cosmic blackbody radiation

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977phrvl..39..898s&link_type=abstract

Physical Review Letters, vol. 39, Oct. 3, 1977, p. 898-901. ERDA-NASA-supported research.

Physics

203

Anisotropy, Black Body Radiation, Extraterrestrial Radio Waves, Millimeter Waves, Relativity, Airborne Equipment, Cosmic Rays, Cosmology, Dicke Radiometers, Galactic Radiation, Microwave Emission, Microwave Radiometers, Northern Hemisphere, Radiation Measurement, Spherical Harmonics, U-2 Aircraft

Scientific paper

Anisotropy has been detected in the cosmic blackbody radiation with a 33-GHz (0.9 cm) twin-antenna Dicke radiometer flown to an altitude of 20 km aboard a U-2 aircraft. In data distributed over two-thirds of the Northern Hemisphere, an anisotropy is observed, which is well fitted by a first-order spherical harmonic with an amplitude of (3.5 plus or minus 0.6) x 10 to the -3rd deg K, and direction 11.0 plus or minus 0.6 h right ascension and 6 plus or minus 10 deg declination. This observation is readily interpreted as due to motion of the earth relative to the radiation with a velocity of 390 plus or minus 60 km/sec.

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