The Australia Telescope Large Area Survey: Spectroscopic catalogue and radio luminosity functions
MetadataShow full item record
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
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.
Showing items related by title, author, creator and subject.
The Spitzer mid-infrared active galactic nucleus survey. I. Optical and near-infrared spectroscopy of obscured candidates and normal active galactic nuclei selected in the mid-infraredLacy, M.; Ridgway, S.; Gates, E.; Nielsen, D.; Petric, A.; Sajina, A.; Urrutia, T.; Cox Drews, S.; Harrison, C.; Seymour, Nick; Storrie-Lombardi, L. (2013)We present the results of a program of optical and near-infrared spectroscopic follow-up of candidate active galactic nuclei (AGNs) selected in the mid-infrared. This survey selects both normal and obscured AGNs closely ...
A redshift survey of herschel far-infrared selected starbursts and implications for obscured star formationCasey, C.; Berta, S.; Béthermin, M.; Bock, J.; Bridge, C.; Budynkiewicz, J.; Burgarella, D.; Chapin, E.; Chapman, S.; Clements, D.; Conley, A.; Conselice, C.; Cooray, A.; Farrah, D.; Hatziminaoglou, E.; Ivison, R.; Le Floc'h, E.; Lutz, D.; Magdis, G.; Magnelli, B.; Oliver, S.; Page, M.; Pozzi, F.; Rigopoulou, D.; Riguccini, L.; Roseboom, I.; Sanders, D.; Scott, D.; Seymour, Nick; Valtchanov, I.; Vieira, J.; Viero, M.; Wardlow, J. (2012)We present Keck spectroscopic observations and redshifts for a sample of 767 Herschel-SPIRE selected galaxies (HSGs) at 250, 350, and 500 μm, taken with the Keck I Low Resolution Imaging Spectrometer and the Keck II DEep ...
Sadler, E.; Ekers, Ronald; Mahony, E.; Mauch, T.; Murphy, T. (2014)We have made the first detailed study of the high-frequency radio-source population in the local Universe, using a sample of 202 radio sources from the Australia Telescope 20 GHz (AT20G) survey identified with galaxies ...