Structure in the COBE differential microwave radiometer first-year maps

Journal Article · Tue Sep 01 00:00:00 EDT 1992 · Astrophysical Journal; (United States)

DOI:https://doi.org/10.1086/186504· OSTI ID:7159131

Smoot, G F; Bennett, C L; Kogut, A; Wright, E L; Aymon, J; Boggess, N W; Cheng, E S; De Amici, G; Gulkis, S; Hauser, M G ^[1]

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1. Lawrence Berkeley Laboratory, CA (United States) California, University, Berkeley (United States) NASA, Goddard Space Flight Center, Greenbelt, MA (United States) Universities Space Research Association, Boulder, CO (United States) California, University, Los Angeles (United States) JPL, Pasadena, CA (United States)

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. 29 refs.

• OSTI ID: 7159131
• Journal Information: Astrophysical Journal; (United States), Journal Name: Astrophysical Journal; (United States) Vol. 396:1; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

661300* -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CORRELATIONS
COSMOLOGICAL MODELS
DATA ANALYSIS
ELECTROMAGNETIC RADIATION
ERRORS
GALAXIES
INFLATIONARY UNIVERSE
MATHEMATICAL MODELS
MATHEMATICS
MEASURING INSTRUMENTS
MEASURING METHODS
MICROWAVE RADIATION
MILKY WAY
RADIATION DETECTORS
RADIATIONS
RADIOMETERS
RELICT RADIATION
SATELLITES
STATISTICS