The Cosmic Evolution of Quasars

Details The Cosmic Evolution of Quasars The Cosmic Evolution of Quasars

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..692j&link_type=abstract

Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 July

Astronomy and Astrophysics

Astronomy

Scientific paper

The form of the quasar luminosity function (LF) and its redshift dependence to z~1 are well established for both radio and optically-selected Quasar samples. In both cases powerful evolution is required to explain the changing LF so that by z~1 there is an increase of order of 100 - 1000 in the space density of the most luminous sources. But what happens at high redshift is more difficult to deduce. In this paper I will discuss how a large sample of radio-selected Quasars has been used to determine the overall behaviour of the high-redshift LF. These results are then coupled with source evolution and beaming models based on the radio-loud Unified Scheme paradigm to further delimit high-redshift Quasar evolution.

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