Physics
Scientific paper
Jun 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980phrvl..44.1563f&link_type=abstract
Physical Review Letters, vol. 44, June 9, 1980, p. 1563-1566. Research supported by the Consiglio Nazionale delle Ricerche.
Physics
66
Anisotropy, Background Radiation, Cosmic Rays, Millimeter Waves, Balloon-Borne Instruments, Dipole Moments, Galactic Radiation, Harmonic Radiation, Relic Radiation
Scientific paper
A measurement of the large-scale dipole anisotropy in the cosmic background radiation at millimeter wavelengths is reported. A balloon-borne instrument consisting of a sinusoidally wobbling mirror with an amplitude of 6 deg and a Ge-Ga bolometer sensitive in the region 500-3000 microns was tilted at angles from 0 to 30 deg above the horizon to detect variations in the cosmic background flux. Signals detected at high galactic latitudes reveal the presence of a large-scale anisotropy with the dipole temperature, right ascension and declination of 2.94 plus 1.30 or minus 0.60 mK, 11 h 24 m plus or minus 0 H 40 m and 3 plus or minus 10 deg, respectively. Observations also suggest the presence of a quadrupole moment with an amplitude approximately 1/3 of the dipole amplitude.
Fabbri Renato
Guidi I.
Melchiorri Francesco
Natale Vincenzo
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