1986
DOI: 10.1017/s0074180900153203
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The statistics of radio galaxies & quasars at high redshift

Abstract: ABSTRACT.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 ζ = 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 ζ ) 2 may be an artifact of gravitation… Show more

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