Letter | Published:

Airborne measurement of the temperature of the cosmic microwave background at 3.3 mm

Naturevolume 247pages528530 (1974) | Download Citation

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Abstract

THE ‘primaeval fireball1 model of the Universe’ predicts a cosmic microwave background radiation field which has the spectral character of a blackbody source. The radiation arises from an initially very dense, very hot Universe, and has been cooled to around 2.7 K through the cosmological expansion. Previous ground-based radiometric measurements2–6 at wavelengths as short as 3.3 mm are consistent with a 2.7 K blackbody, but most of these points are in the Rayleigh-Jeang tail of such a blackbody spectrum.

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References

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Author notes

    • ROBERT A. STOKES

    Present address: Battelle Observatory Richland, Washington, 99352

Affiliations

  1. Department of Astronomy, University of Washington, Seattle, Washington

    • PAUL E. BOYNTON
  2. Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky

    • ROBERT A. STOKES

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https://doi.org/10.1038/247528a0

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