A search for anisotropy in the cosmic microwave radiation at medium angular scales

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Astrophysical Journal; (USA)

DOI:https://doi.org/10.1086/168599· OSTI ID:6865044

Timbie, P T; Wilkinson, D T ^[1]

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1. Princeton Univ., NJ (USA)

The results are reported from a search for anisotropy in the cosmic microwave radiation (CMR) at angular scales of 0.5 to 5 deg. No temperature fluctuations are detected, and limits are placed on intrinsic CMR anisotropy. These limits are expressed in terms of two models which describe the temperature fluctuations. For models specified by a Gaussian-shaped correlation function, the fluctuation amplitude is found to be 1.1 x 10 to the -4th or less at 1.1 deg; for models with monochromatic fluctuations it is 7.5 x 10 to the -5th or less at 1.7 deg. These limits satisfy the likelihood ratio test at the 95 percent confidence level. The implications of the results for large-scale structure information scenarios are discussed. 26 refs.

• OSTI ID: 6865044
• Journal Information: Astrophysical Journal; (USA), Journal Name: Astrophysical Journal; (USA) Vol. 353; ISSN ASJOA; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

640106* -- Astrophysics & Cosmology-- Cosmology
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
DISTRIBUTION
ELECTROMAGNETIC RADIATION
LIMITING VALUES
MASS DISTRIBUTION
MATHEMATICAL MODELS
MICROWAVE RADIATION
MONTE CARLO METHOD
NONLUMINOUS MATTER
RADIATIONS
RELICT RADIATION
SPATIAL DISTRIBUTION
UNIVERSE