Test of luminosity evolution of quasars

Details Test of luminosity evolution of quasars Test of luminosity evolution of quasars

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983liaco..24..250p&link_type=abstract

IN: Quasars and gravitational lenses; Proceedings of the Twenty-fourth Liege International Astrophysical Colloquium, Cointe-Ougr

Astronomy and Astrophysics

Astrophysics

1

Astronomical Models, Cosmology, Extragalactic Radio Sources, Luminosity, Multivariate Statistical Analysis, Quasars, Evolution (Development), Space Density, Statistical Distributions

Scientific paper

A test is proposed for evaluating the form of the luminosity function and its evolution for optically selected extragalactic sources. It is shown that pure luminosity evolution is not consistent with a large sample of bright QSO's obtained by Schmidt and Green (1983) and that such a model is not attractive on theoretical grounds. Similarly, pure density evolution is also inconsistent with the data, even though such a model provides a good description of radio selected samples. Both the two-class model proposed by Petrosian (1973) and the Schmidt-Green model are shown to be consistent with the existing data.

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