VLBI detection of an Infrared-Faint Radio Source

Details VLBI detection of an Infrared-Faint Radio Source VLBI detection of an Infrared-Faint Radio Source

2007-04-20

arxiv.org/abs/0704.2640v1

Mon.Not.Roy.Astron.Soc.378:1434-1438,2007

Astronomy and Astrophysics

Astrophysics

accepted by MNRAS

Scientific paper

10.1111/j.1365-2966.2007.11883.x

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.

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