Redshift Distribution of Quasi-Stellar Objects And the Radio Source Counts

摘要

The authors discuss the large scale redshift distribution of QSO's to determine their evolution and reality of the apparent cut-off in their distribution for redshift z greater than or equal to 2.3, in the relativistic cosmological model with zero cosmological constant and with deceleration parameter q sub zero = +1. The authors do not discuss the distribution in the Lemaitre models which were introduced in 1967 (Petrosian et. al.) and have been reviewed recently (Petrosian and Salpeter 1970). In a recent article (Petrosian 1970) the authors have shown that the density evolution derived by Schmidt (1968) from the data on 33 3CR quasi-stellar radio sources (QSR's) cannot continue beyond z approximately equal to 2.2. In the report the authors discuss possible evolutions of sources for z greater than 2.2, then based on these models the authors calculate the contribution of QSR's to the radio source counts. (Author)