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Deep spitzer observations of infrared-faint radio sources: High-redshift radio-loud active galactic nuclei?
Citation
Norris, RP and Afonso, J and Cava, A and Farrah, D and Huynh, MT and Ivison, RJ and Jarvis, M and Lacy, M and Mao, M and Maraston, C and Mauduit, J-C and Middelberg, E and Oliver, S and Seymour, N and Surace, J, Deep spitzer observations of infrared-faint radio sources: High-redshift radio-loud active galactic nuclei?, The Astrophysical Journal: An International Review of Astronomy and Astronomical Physics, 736, (1) EJ ISSN 0004-637X (2011) [Refereed Article]
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Copyright Statement
Copyright 2011 American Astronomical Society
DOI: doi:10.1088/0004-637X/736/1/55
Abstract
Infrared-faint radio sources (IFRSs) are a rare class of objects which are relatively bright at radio wavelengths but very faint at infrared and optical wavelengths. Here we present sensitive near-infrared observations of a sample of these sources taken as part of the Spitzer Extragalactic Representative Volume Survey. Nearly all the IFRSs are undetected at a level of ~1 ìJy in these new deep observations, and even the detections are consistent with confusion with unrelated galaxies. A stacked image implies that the median flux density is S3.6 ìm ~ 0.2 ìJy or less, giving extreme values of the radio-infrared flux density ratio. Comparison of these objects with known classes of object suggests that the majority are probably high-redshift radio-loud galaxies, possibly suffering from significant dust extinction.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | galaxies: evolution; galaxies: formation; galaxies: starburst |
| Research Division: | Physical Sciences |
| Research Group: | Astronomical sciences |
| Research Field: | Cosmology and extragalactic astronomy |
| Objective Division: | Expanding Knowledge |
| Objective Group: | Expanding knowledge |
| Objective Field: | Expanding knowledge in the physical sciences |
| UTAS Author: | Mao, M (Miss Minnie Mao) |
| ID Code: | 75140 |
| Year Published: | 2011 |
| Web of Science® Times Cited: | 29 |
| Deposited By: | Mathematics and Physics |
| Deposited On: | 2012-01-12 |
| Last Modified: | 2012-04-23 |
| Downloads: | 0 |
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