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The Distant DRAGNs Survey

Published online by Cambridge University Press:  25 May 2016

J. D. B. Law-Green
J. D. B. Law-Green*
Affiliation:
University of Manchester, NRAL Jodrell Bank, Cheshire SK11 9DH, UK

Extract

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DRAGNs (Double Radio sources Associated with Galactic Nuclei, Leahy 1991) are the class of powerful extragalactic radio sources thought to be produced by the interaction of a jet with the ambient medium. They exhibit strong cosmological evolution in comoving number density; at z ≃ 2 the “classical double” FR II DRAGNs were ≃ 1000 times as common as they are now (Dunlop & Peacock 1990).

To understand this, systematic studies of complete DRAGN samples at low and high z and differing levels of flux density are required, in order to resolve the P – z ambiguity. The Distant DRAGNs Survey is a long-term project to image with the VLA and MERLIN, matched samples of DRAGNs at high redshift.

Type
Surveys of Radio Sources
Information
Symposium - International Astronomical Union , Volume 175: Extragalactic Radio Sources , 1996 , pp. 513 - 514
Copyright
Copyright © Kluwer 1996 

References

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