Spectrum of the Extra-galactic Background Radiation at Low Radio Frequencies

Details Spectrum of the Extra-galactic Background Radiation at Low Radio Frequencies Spectrum of the Extra-galactic Background Radiation at Low Radio Frequencies

Nov 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970natur.228..847c&link_type=abstract

Nature, Volume 228, Issue 5274, pp. 847-849 (1970).

Computer Science

60

Scientific paper

THE cosmic noise background radiation observed at metre and decametre wavelengths is generally considered to result from several different spatial components. These include synchrotron radiation from cosmic ray electrons in the galactic disk, similar radiation from the galactic halo (although the relative importance of this component is a matter of considerable controversy), and an isotropic radiation component from the integrated emission of all unresolved extra-galactic radio sources. Results of recent analyses of metre-wave measurements1-3 place the brightness I x of the isotropic component at about one-third the minimum total brightness observed at a frequency f of 100 MHz. The spectral index α x of the isotropic radiation is thought to be about equal to the average spectral index (~0.8) observed for surveys of extra-galactic discrete sources4 at f ~ 100 MHz where

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