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The Australia Telescope Large Area Survey: spectroscopic catalogue and radio luminosity functions

Citation

Mao, MY and Sharp, R and Norris, RP and Hopkins, AM and Seymour, N and Lovell, JEJ and Middelberg, E and Randall, KE and Sadler, EM and Saikia, DJ and Shabala, SS and Zinn, P-C, The Australia Telescope Large Area Survey: spectroscopic catalogue and radio luminosity functions, Monthly Notices of the Royal Astronomical Society, 426, (4) pp. 3334-3348. ISSN 0035-8711 (2012) [Refereed Article]

Copyright Statement

Copyright 2012 The Authors.

DOI: doi:10.1111/j.1365-2966.2012.21913.x

Abstract

The Australia Telescope Large Area Survey (ATLAS) has surveyed 7 square degrees of sky around the Chandra Deep Field South and the European Large Area ISO Survey-South 1 fields at 1.4 GHz. ATLAS aims to reach a uniform sensitivity of 10 μJy  beam−1 rms over the entire region with first data release currently reaching ∼ 30 μJy  beam−1 rms. Here we present 466 new spectroscopic redshifts for radio sources in ATLAS as part of our optical follow-up programme. Of the 466 radio sources with new spectroscopic redshifts, 142 have star-forming optical spectra, 282 show evidence for active galactic nuclei (AGN) in their optical spectra, 10 have stellar spectra and 32 have spectra revealing redshifts, but with insufficient features to classify. We compare our spectroscopic classifications with two mid-infrared diagnostics and find them to be in broad agreement. We also construct the radio luminosity function for star-forming galaxies to z = 0.5 and for AGN to z = 0.8. The radio luminosity function for star-forming galaxies appears to be in good agreement with previous studies. The radio luminosity function for AGN appears higher than previous studies of the local AGN radio luminosity function. We explore the possibility of evolution, cosmic variance and classification techniques affecting the AGN radio luminosity function. ATLAS is a pathfinder for the forthcoming Evolution Map of the Universe (EMU) survey and the data presented in this paper will be used to guide EMU's survey design and early science papers.

Item Details

Item Type:Refereed Article
Keywords:galaxies: active; galaxies: distances and redshifts; galaxies: general; radio continuum: galaxies
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Galactic Astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Mao, MY (Miss Minnie Mao)
Author:Lovell, JEJ (Dr Jim Lovell)
Author:Shabala, SS (Dr Stas Shabala)
ID Code:80430
Year Published:2012
Web of Science® Times Cited:28
Deposited By:Mathematics and Physics
Deposited On:2012-10-31
Last Modified:2013-07-02
Downloads:0

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