Structure in the COBE differential microwave radiometer first-year maps
- G. F. Smoot
- C. L. Bennett
- A. Kogut
- E. L. Wright
- J. Aymon
- N. W. Boggess
- E. S. Cheng
- Giovanni De Amici
- S. Gulkis
- M. G. Hauser
- G. Hinshaw
- PJP. Jackson
- M. A. Janssen
- Ed Kaita
- T. Kelsall
- P. Keegstra
- Charles H. Lineweaver
- K. Loewenstein
- P. M. Lubin
- John Mather
- S. S. Meyer
- S. H. Moseley
- T. L. Murdock
- L. Rokke
- R. F. Silverberg
- Luis Tenorio
- R. Weiß
- D. T. Wilkinson
- PJP. Jackson
The Astrophysical Journal · 1992 · IOP Publishing
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Abstract
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.