Evidence of Radio Luminosity Evolution of Quasi-stellar Radio Sources

Details Evidence of Radio Luminosity Evolution of Quasi-stellar Radio Sources Evidence of Radio Luminosity Evolution of Quasi-stellar Radio Sources

Jan 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970natur.225..358a&link_type=abstract

Nature, Volume 225, Issue 5230, pp. 358-359 (1970).

Physics

6

Scientific paper

THE evolution of quasi-stellar radio sources has been studied by investigating the relationship between logN and logS, where N is the number of sources with flux density exceeding S (refs. 1-4), but this method does not distinguish between density evolution and luminosity evolution. A differential study of the optical and radio brightnesses of quasars may provide a method for determining the nature of their evolution. Density variation would be expressed both in the radio and optical wavelengths, while luminosity evolution may only be shown in the optical brightness.

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