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Surveys of extragalactic radio sources

Published online by Cambridge University Press:  26 January 2006

L.I. Gurvits ,
S. Frey ,
S. Rawlings  and
J. J. Condon
J. J. Condon*
Affiliation:
National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA;
*
jcondon@nrao.edu
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Abstract

Nearly all discrete radio sources are extragalactic and lie atcosmological distances. Most sources stronger than ~1 mJy at1.4 GHz are powered by active galactic nuclei (AGNs), while themajority of fainter sources are in starburst galaxies. Recent all-skysurveys have detected most of this AGN population, and smaller surveysare now sensitive enough to probe the evolution of star formation inselected areas. Sensitive new radio surveys will complementfar-infrared, ultraviolet, and X-ray surveys now being made in “cosmicwindows” having exptionally low interstellar extinction. They willhelp define the evolution of star-formation and dust-shrouded AGNsover cosmological timescales.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 15: Radio Astronomy from Karl Jansky to Microjansky – JENAM'03 , 2005 , pp. 57 - 71
Copyright
© EAS, EDP Sciences, 2005

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