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Spectral index properties of milliJansky radio sources
Citation
Randall, KE and Hopkins, AM and Norris, RP and Zinn, P-C and Middelberg, E and Mao, MY and Sharp, RG, Spectral index properties of milliJansky radio sources, Monthly Notices of the Royal Astronomical Society, 421, (2) pp. 1644-1660. ISSN 0035-8711 (2012) [Refereed Article]
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Copyright Statement
Copyright 2012 RAS
DOI: doi:10.1111/j.1365-2966.2012.20422.x
Abstract
At the faintest radio flux densities (S1.4 < 10 mJy), conflicting results have arisen regarding whether there is a flattening of the average spectral index between a low radio frequency (325 or 610 MHz) and, for example, 1.4 GHz. We present a new catalogue of 843-MHz radio sources in the European Large Area ISO Survey-South 1 field, which contains the sources, their Australia Telescope Large Area Survey (ATLAS) counterparts and the spectral index distribution of the sources as a function of flux density. We do not find any statistically significant evidence for a trend towards flatter spectral indices with decreasing flux density. We then investigate the spectral index distribution with redshift for those sources with reliable redshifts and explore the infrared properties. An initial sample of faint compact steep-spectrum sources in ATLAS are also presented, with a brief overview of their properties.
Item Details
| Item Type: | Refereed Article |
|---|---|
| Keywords: | catalogues; galaxies: active; galaxies: evolution; radio continuum: galaxies |
| 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, MY (Miss Minnie Mao) |
| ID Code: | 78628 |
| Year Published: | 2012 |
| Web of Science® Times Cited: | 33 |
| Deposited By: | Mathematics and Physics |
| Deposited On: | 2012-07-10 |
| Last Modified: | 2013-04-04 |
| Downloads: | 0 |
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