Measurements of the cosmic background radiation

Details Measurements of the cosmic background radiation Measurements of the cosmic background radiation

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987stin...8820248l&link_type=abstract

Unknown

Computer Science

Background Radiation, Radiation Measurement, Relic Radiation, Galactic Rotation, Milky Way Galaxy, Radiation Distribution, Spherical Harmonics, Virgo Galactic Cluster

Scientific paper

Maps of the large scale structure (theta is greater than 6 deg) of the cosmic background radiation covering 90 percent of the sky are now available. The data show a very strong 50-100 sigma (statistical error) dipole component, interpreted as being due to our motion, with a direction of alpha = 11.5 + or - 0.15 hours, sigma = -5.6 + or - 2.0 deg. The inferred direction of the velocity of our galaxy relative to the cosmic background radiation is alpha = 10.6 + or - 0.3 hours, sigma = -2.3 + or - 5 deg. This is 44 deg from the center of the Virgo cluster. After removing the dipole component, the data show a galactic signature but no apparent residual structure. An autocorrelation of the residual data, after substraction of the galactic component from a combined Berkeley (3 mm) and Princeton (12 mm) data sets, show no apparent structure from 10 to 180 deg with a rms of 0.01 mK2. At 90 percent confidence level limit of .00007 is placed on a quadrupole component.

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