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The Microwave Background Radiation

Published online by Cambridge University Press:  08 February 2017

G. De Zotti ,
L. Danese ,
L. Toffolatti  and
A. Franceschini
G. De Zotti
Affiliation:
Astronomical Observatory and Department of Astronomy Vicolo dell' Osservatorio, 5 I-35122 Padova, Italy
L. Danese
Affiliation:
Astronomical Observatory and Department of Astronomy Vicolo dell' Osservatorio, 5 I-35122 Padova, Italy
L. Toffolatti
Affiliation:
Astronomical Observatory and Department of Astronomy Vicolo dell' Osservatorio, 5 I-35122 Padova, Italy
A. Franceschini
Affiliation:
Astronomical Observatory and Department of Astronomy Vicolo dell' Osservatorio, 5 I-35122 Padova, Italy

Abstract

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We review the data on the spectrum and isotropy of the microwave background radiation and the astrophysical processes that may produce spectral distortions and anisotropies. As yet no fully satisfactory explanation has been found for the submillimeter excess observed by Matsumoto et al. (1988). The most precise data at λ > 1 mm disagree with nonrelativistic comptonization models which match the excess. Distortions produced by a very hot intergalactic medium yielding the X-ray background do not fit the submillimeter data. Very special requirements must be met for the interpretation in terms of high-redshift dust emission to work.

Reported anisotropies on scales of several degrees and of tens of arcsec may be produced, at least in part, by discrete sources. Because the best experiments at cm wavelengths are close to the confusion limit, they provide interesting information on the large-scale distribution of radio sources.

Type
IV. Extragalactic Background Radiation and Cosmology
Information
Symposium - International Astronomical Union , Volume 139: The Galactic and Extragalactic Background Radiation , 1990 , pp. 333 - 343
Copyright
Copyright © Kluwer 1990 

References

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