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No evidence for a 'redshift cut-off' for the most powerful classical double radio sources

Jarvis, Matt J., Rawlings, Steve, Willott, Chris J., Blundell, Katherine M., Eales, Stephen Anthony and Lacy, Mark 1999. No evidence for a 'redshift cut-off' for the most powerful classical double radio sources. Presented at: The Hy-Redshift Universe: Galaxy Formation and Evolution at High Redshift, Berkeley, CA, USA, 21-24 June 1999. Published in: Bunker, Andrew John, Johannes, Willem and van Breugel, Maria eds. The Hy-redshift universe: galaxy formation and evolution at high redshift. Astronomical Society of the Pacific Conference Series , vol. 193. Ann Arbor, MI: Astronomical Society of the Pacific, pp. 90-93.

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We use three samples (3CRR, 6CE and 6C*) to investigate the radio luminosity function (RLF) for the `most powerful' low-frequency selected radio sources. We find that the data are well fitted by a model with a constant co-moving space density at high redshift as well as by one with a declining co-moving space density above some particular redshift. This behaviour is very similar to that inferred for steep-spectrum radio quasars by Willott et al (1998) in line with the expectations of Unified Schemes. We conclude that there is as yet no evidence for a `redshift cut-off' in the co-moving space densities of powerful classical double radio sources, and rule out a cut-off at z < 2.5.

Item Type: Conference or Workshop Item (Paper)
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QB Astronomy
Additional Information: Proceedings of a conference held at the University of California, Berkeley, California, USA, to celebrate the research interests of Hyron Spinrad on his 65th birthday
Publisher: Astronomical Society of the Pacific
ISBN: 9781583810194
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Last Modified: 04 Jun 2017 05:06

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