Evidence for Infrared-faint Radio Sources as z > 1 Radio-loud Active Galactic Nuclei
Abstract
Infrared-Faint Radio Sources (IFRSs) are a class of radio objects found in the Australia Telescope Large Area Survey 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 (3.6-70 μm) 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 spectral energy distribution of these objects shows that they are consistent with high-redshift (z >~ 1) active galactic nuclei.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- February 2010
- DOI:
- 10.1088/0004-637X/710/1/698
- arXiv:
- arXiv:1001.2084
- Bibcode:
- 2010ApJ...710..698H
- Keywords:
-
- galaxies: evolution;
- galaxies: formation;
- galaxies: starburst;
- Astrophysics - Cosmology and Extragalactic Astrophysics
- E-Print:
- 10 pages, 7 figures, accepted for publication in ApJ