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Very long baseline interferometry detection of an Infrared-Faint Radio Source

Norris, Ray P. and Tingay, Steven and Phillips, Chris and Middelberg, Enno and Deller, Adam and Appleton, Philip N. (2007) Very long baseline interferometry detection of an Infrared-Faint Radio Source. Monthly Notices of the Royal Astronomical Society, 378 (4). pp. 1434-1438. ISSN 0035-8711.

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Infrared-Faint Radio Sources represent a new and unexpected class of object which is bright at radio wavelengths but unusually faint at infrared wavelengths. If, like most mJy radio sources, they were either conventional active or star-forming galaxies in the local Universe, we would expect them to be detectable at infrared wavelengths, and so their non-detection by the Spitzer Space Telescope is surprising. Here, we report the detection of one of these sources using very long baseline interferometry, from which we conclude that the sources are driven by active galactic nuclei. We suggest that these sources are either normal radio-loud quasars at high redshift or abnormally obscured radio galaxies.

Item Type:Article
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URLURL TypeDescription
Norris, Ray P.0000-0002-4597-1906
Deller, Adam0000-0001-9434-3837
Appleton, Philip N.0000-0002-7607-8766
Additional Information:© 2007 The Authors. Journal compilation © 2007 RAS. Accepted 2007 April 18. Received 2007 April 18; in original form 2007 March 18. Published Online: 26 May 2007. We thank the Australian LBA team whose continuing efforts make observations like this possible, and especially the University of Tasmania for making the Hobart antenna available. Like countless other papers, this one has made extensive use of Ned Wright’s Cosmology Calculator ( and we thank and applaud Ned Wright for making such a valuable tool available to the community. The Australia Telescope is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO. This research has made use of the NASA/IPAC Extragalactic Data base (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. ATD is supported by a Swinburne University Chancellor’s Research scholarship and a CSIRO postgraduate scholarship.
Funding AgencyGrant Number
Commonwealth Scientific and Research Organization (CSIRO)UNSPECIFIED
Swinburne UniversityUNSPECIFIED
Subject Keywords:high angular resolution; active galaxies; galactic evolution; high-redshift galaxies; radio continuum
Issue or Number:4
Record Number:CaltechAUTHORS:NORmnras07a
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11393
Deposited By: Archive Administrator
Deposited On:12 Aug 2008 06:48
Last Modified:09 Mar 2020 13:19

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