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The statistics of radio galaxies & quasars at high redshift

Published online by Cambridge University Press:  19 July 2016

J.A. Peacock  and
J.S. Dunlop
J.A. Peacock
Affiliation:
Royal Observatory, Edinburgh
J.S. Dunlop
Affiliation:
Department of Astronomy, University of Edinburgh

Abstract

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Evidence is now accumulating that the most powerful extragalactic radio sources display a cutoff in comoving density at relatively low redshift. For both radio galaxies and quasars, the luminosity function falls by a factor ≥ 3 between z = 2 and 4. We describe the data which lead to this conclusion, and discuss the prospects for studying the behaviour of low-luminosity active galaxies at high redshift. The strong evolution of highly luminous radio-quiet quasars at z > 2 may be an artifact of gravitational lensing.

Type
V. Cosmological Studies, Clustering, Isotropy etc
Information
Symposium - International Astronomical Union , Volume 119: Quasars , 1986 , pp. 455 - 462
Copyright
Copyright © Reidel 1986 

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