Cosmic microwave background - Present status and future prospects

Details Cosmic microwave background - Present status and future prospects Cosmic microwave background - Present status and future prospects

Feb 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980nyasa.336..116m&link_type=abstract

In: Texas Symposium on Relativistic Astrophysics, 9th, Munich, West Germany, December 14-19, 1978, Proceedings. (A80-42502 18-90

Astronomy and Astrophysics

Astronomy

1

Background Radiation, Extraterrestrial Radio Waves, Microwave Spectra, Relic Radiation, Big Bang Cosmology, Cosmic Background Explorer Satellite, Radio Astronomy, Stellar Magnitude

Scientific paper

The status of present measurements of the spectrum and isotropy of the cosmic microwave background is discussed, and prospects for improved measurements are indicated. Following a review of the origin of the background according to the standard big bang model of the origin of the universe, measured spectra of the cosmic background verifying the Wien tail of the Planck distribution are presented and the presence of a possible deviation from the blackbody curve in the spectrum of Woody and Richards (1979) is noted. Experimental measurements of the large-angular-scale isotropy of the cosmic background are discussed, and it is pointed out that the isotropy observed can be accounted for by the motion of the earth relative to the radiation, the calculated magnitude of which implies an unexpectedly large net velocity for the local group of galaxies. The planned COBE (cosmic background explorer) satellite is then presented as a means for acquiring order of magnitude improvements in spectral and directional sensitivity in cosmic background radiation investigations.

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