Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...244..361g&link_type=abstract
Astrophysical Journal, Part 1, vol. 244, Mar. 1, 1981, p. 361-381. NASA-supported research;
Astronomy and Astrophysics
Astrophysics
32
Background Radiation, Big Bang Cosmology, Cosmic Rays, Microwave Radiometers, Angular Distribution, Anisotropy, Astronomical Models, Data Acquisition, Data Reduction, Galactic Evolution, Microwave Antennas
Scientific paper
Results of an extended series of airborne measurements of large-angular-scale anisotropy in the 3-K cosmic background radiation are reported. A dual-antenna microwave radiometer operating at 33 GHz flown aboard a U-2 aircraft to 20-km altitude on 11 flights between December 1976 and May 1978 measured differential intensity between pairs of directions distributed over most of the Northern Hemisphere. Measurements show clear evidence of anisotropy that is readily interpreted as due to the solar motion relative to the sources of the radiation. The anisotropy is well fitted by a first order spherical harmonic of amplitude 3.6 + or - 0.5 mK, corresponding to a velocity of 360 + or - 50 km/s toward the direction 11.2 + or - 0.5 hours of right ascension and 19 deg + or - 8 deg declination.
Gorenstein M. V.
Smoot George F.
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