Evidence for Infrared-Faint Radio Sources as z > 1 Radio-Loud AGN

Abstract

Infrared-Faint Radio Sources (IFRSs) are a class of radio objects found in the Australia Telescope Large Area Survey (ATLAS) which have no observable mid-infrared counterpart in the Spitzer Wide-area Infrared Extragalactic (SWIRE) survey. The extended Chandra Deep Field South now has even deeper Spitzer imaging (3.6 to 70 micron) from a number of Legacy surveys. We report the detections of two IFRS sources in IRAC images. The non-detection of two other IFRSs allows us to constrain the source type. Detailed modeling of the SED of these objects shows that they are consistent with high redshift (z > 1) AGN.

10 pages, 7 figures, accepted for publication in ApJ

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Cited by in corpus (23)

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• Wide-field VLBA Observations of the Chandra Deep Field South
• Search for ionized jets towards high-mass young stellar objects
• Infrared-Faint Radio Sources: A New Population of High-redshift Radio Galaxies
• The radio properties of infrared-faint radio sources
• Deep Spitzer observations of infrared-faint radio sources: high-redshift radio-loud AGN?
• Multiwavelength characterization of faint Ultra Steep Spectrum radio sources : A search for high-redshift radio galaxies
• Infrared-Faint Radio Sources: A Cosmological View - AGN Number Counts, the Cosmic X-Ray Background and SMBH Formation
• Ultra Steep Spectrum radio sources in the Lockman Hole: SERVS identifications and redshift distribution at the faintest radio fluxes
• Infrared-Faint Radio Sources are at high redshifts
• MIPS 24 Micron Observations of the Hubble Deep Field South: Probing the IR-Radio Correlation of Galaxies at z > 1
• A Fully-Identified Sample of AEGIS20 Microjansky Radio Sources
• The radio spectral energy distribution of infrared-faint radio sources
• The Redshift Distribution of Infrared-Faint Radio Sources
• Infrared-Faint Radio Sources in the SERVS deep fields: Pinpointing AGNs at high redshift
• On the nature of infrared-faint radio sources in the SXDF and VLA-VVDS fields
• Active galactic nuclei cores in infrared-faint radio sources: Very long baseline interferometry observations using the Very Long Baseline Array
• Infrared-faint radio sources remain undetected at far-infrared wavelengths. Deep photometric observations using the Herschel Space Observatory
• Optically Faint Radio Sources: Reborn AGN?
• Are the infrared-faint radio sources pulsars?
• Multiwavelength Properties of Infrared-Faint Radio Sources Based on Spectral Energy Distribution Analysis