Structure in the COBE differential microwave radiometer first-year maps

Details Structure in the COBE differential microwave radiometer first-year maps Structure in the COBE differential microwave radiometer first-year maps

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...396l...1s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 396, no. 1, Sept. 1, 1992, p. L1-L5. Research supported by NASA.

Astronomy and Astrophysics

Astrophysics

1958

Cosmic Background Explorer Satellite, Microwave Radiometers, Normal Density Functions, Relic Radiation, Root-Mean-Square Errors, Astronomical Maps, Milky Way Galaxy

Scientific paper

Results of the first year of data from the differential microwave radiometers on the Cosmic Background Explorer are presented. Statistically significant structure that is well described as scale-invariant fluctuations with a Gaussian distribution is shown. The rms sky variation, smoothed to a total 10-deg FWHM Gaussian, is 30 +/-5 micro-K for Galactic latitude greater than 20-deg data with the dipole anisotropy removed. The rms cosmic quadrupole amplitude is 13 +/-4 micro-K. The angular autocorrelation of the signal in each radiometer channel and cross-correlation between channels are consistent and give a primordial fluctuation power-law spectrum with index of 1.1 +/-0.5, and an rms-quadrupole-normalized amplitude of 16 +/-4 micro-K. These features are in accord with the Harrison-Zel'dovich spectrum predicted by models of inflationary cosmology.

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