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Abstract: Infrared-Faint Radio Sources represent a new and unexpected class of objectwhich is bright at radio wavelengths but unusually faint at infraredwavelengths. If, like most mJy radio sources, they were either conventionalactive or star-forming galaxies in the local Universe, we would expect them tobe detectable at infrared wavelengths, and so their non-detection by theSpitzer Space Telescope is surprising. Here we report the detection of one ofthese sources using Very Long Baseline Interferometry, from which we concludethat the sources are driven by Active Galactic Nuclei. We suggest that thesesources are either normal radio-loud quasars at high redshift or abnormallyobscured radio galaxies.

Autor: Ray P. Norris, Steven Tingay, Chris Phillips, Enno Middelberg, Adam Deller, Philip N. Appleton

Fuente: https://arxiv.org/

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