Dependence of the luminosity and spatial density of quasars on their redshift

Details Dependence of the luminosity and spatial density of quasars on their redshift Dependence of the luminosity and spatial density of quasars on their redshift

Jun 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sva....19..679k&link_type=abstract

(Astronomicheskii Zhurnal, vol. 52, Nov.-Dec. 1975, p. 1132-1138.) Soviet Astronomy, vol. 19, no. 6, 1976, p. 679-682. Translat

Astronomy and Astrophysics

Astronomy

Hubble Diagram, Quasars, Red Shift, Stellar Luminosity, Astronomical Models, Cosmology, Spatial Distribution, Statistical Correlation

Scientific paper

The Hubble diagram for the brightest quasars with slight dispersion is constructed. The slope of the redshift-magnitude relation is 2.24 plus or minus 0.09. For coordination of this slope with the theoretical dependence m (lg z) in the standard cosmological models, quasar luminosities must decrease with time at a rate of one magnitude in 2.5 billion years. The condition of the constancy of quasar spatial density in the comoving space is fulfilled when the deceleration parameter q0 is equal to 4.1 plus or minus 1.3.

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