Radio sources in the 2dF Galaxy Redshift Survey - II. Local radio luminosity functions for AGN and star-forming galaxies at 1.4 GHz
Creators
- Sadler, Elaine M.1
- Jackson, Carole A.2
- Cannon, Russell D.
- McIntyre, Vincent J.3
- Murphy, Tara1
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Bland-Hawthorn, Joss
- Bridges, Terry
- Cole, Shaun
- Colless, Matthew2
- Collins, Chris4
- Couch, Warrick5
- Dalton, Gavin
- De Propris, Roberto5
- Driver, Simon P.
- Efstathiou, George6
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Ellis, Richard S.7
- Frenk, Carlos S.
- Glazebrook, Karl8
- Lahav, Ofer6
- Lewis, Ian
- Lumsden, Stuart9
- Maddox, Steve10
- Madgwick, Darren6
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Norberg, Peder
- Peacock, John A.11
- Peterson, Bruce A.2
- Sutherland, Will
- Taylor, Keith7
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1.
University of Sydney
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2.
Australian National University
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3.
Australia Telescope National Facility
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4.
Liverpool John Moores University
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5.
UNSW Sydney
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6.
University of Cambridge
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7.
California Institute of Technology
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8.
Johns Hopkins University
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9.
University of Leeds
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10.
University of Nottingham
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11.
University of Edinburgh
Abstract
We have cross-matched the 1.4 GHz NRAO VLA Sky Survey (NVSS) with the first 210 fields observed in the 2dF Galaxy Redshift Survey (2dFGRS), covering an effective area of 325 deg² (about 20% of the final 2dFGRS area). This yields a set of optical spectra of 912 candidate NVSS counterparts, of which we identify 757 as genuine radio IDs - the largest and most homogeneous set of radio-source spectra ever obtained. The 2dFGRS radio sources span the redshift range z = 0.005 to 0.438, and are a mixture of active galaxies (60%) and star-forming galaxies (40%). About 25% of the 2dFGRS radio sources are spatially resolved by NVSS, and the sample includes three giant radio galaxies with projected linear size greater than 1 Mpc. The high quality of the 2dF spectra means we can usually distinguish unambiguously between AGN and star-forming galaxies. We have made a new determination of the local radio luminosity function at 1.4 GHz for both active and star-forming galaxies, and derive a local star-formation density of 0.022±0.004 M_⊙ year⁻¹ per cubic Mpc⁻¹ (H₀ = 50 km s⁻¹ Mpc⁻¹).
Additional Information
© 2002 RAS. Accepted 2001 September 4. Received 2001 August 20; in original form 2001 June 14. The 2dF Galaxy Redshift Survey was made possible through the dedicated efforts of the staff of the Anglo-Australian Observatory, both in creating the 2dF instrument and in supporting it on the telescope. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, Caltech, under contract with NASA. We thank Professor Lawrence Cram for helpful conversations about the derivation of star formation rates from radio data, and the referee, Dr I. Snellen, for several perceptive comments which improved the final version of this paper.Attached Files
Published - 329-1-227.pdf
Accepted Version - 0106173.pdf
Files
0106173.pdf
Additional details
Identifiers
- Eprint ID
- 103589
- Resolver ID
- CaltechAUTHORS:20200601-103013889
Related works
Funding
- NASA/JPL/Caltech
Dates
- Created
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2020-06-01Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field