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The Cosmic Evolution of Quasars

Published online by Cambridge University Press:  30 March 2016

Carole Jackson,
Jasper Wall,
Peter Shaver,
Ken Kellermann and
Isobel Hook
Carole Jackson
Affiliation:
CSIRO Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia
Jasper Wall
Affiliation:
Department of Physics & Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
Peter Shaver
Affiliation:
European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching bei München, Germany
Ken Kellermann
Affiliation:
National Radio Astronomy Observatory, Edgemont Road, Charlottesville, VA 22903-2475, USA
Isobel Hook
Affiliation:
Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford 0X1 3RH, UK

Abstract

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The form of the quasar luminosity function and its redshift dependence to z~1 has long been established; powerful evolution is required so that by z=1 there is an increase of order 102 – 103 in the space density of the most luminous sources. However it is more difficult to deduce the form of the LF at high redshifts. In this contribution we discuss how a sample of relatively bright radio sources has been used to determine the high-redshift behavior of the radiodoud quasar luminosity function, and the particular advantages of using a radio-selected sample. Our results illustrate how radio-loud quasar samples can be an efficient probe of the high-redshift. Universe.

Information

Type
I. Joint Discussions
Information
Highlights of Astronomy , Volume 13 , 2005, pp. 692 - 697
Copyright
Copyright © Astronomical Society of Pacific 2005

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