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Title:
Radio sources in the 2dF Galaxy Redshift Survey - II. Local radio luminosity functions for AGN and star-forming galaxies at 1.4 GHz
Authors:
Sadler, Elaine M.; Jackson, Carole A.; Cannon, Russell D.; McIntyre, Vincent J.; Murphy, Tara; Bland-Hawthorn, Joss; Bridges, Terry; Cole, Shaun; Colless, Matthew; Collins, Chris; Couch, Warrick; Dalton, Gavin; De Propris, Roberto; Driver, Simon P.; Efstathiou, George; Ellis, Richard S.; Frenk, Carlos S.; Glazebrook, Karl; Lahav, Ofer; Lewis, Ian; Lumsden, Stuart; Maddox, Steve; Madgwick, Darren; Norberg, Peder; Peacock, John A.; Peterson, Bruce A.; Sutherland, Will; Taylor, Keith
Affiliation:
AA(School of Physics, University of Sydney, NSW 2006, Australia ), AB(Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia ), AC(Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia ), AD(Australia Telescope National Facility, CSIRO, PO Box 76, Epping, NSW 2121, Australia ), AE(School of Physics, University of Sydney, NSW 2006, Australia ), AF(Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia ), AG(Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia ), AH(Department of Physics, South Road, Durham DH1 3LE ), AI(Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia ), AJ(Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Birkenhead L14 1LD ), AK(Department of Astrophysics, University of New South Wales, Sydney, NSW 2052, Australia ), AL(Department of Physics, Keble Road, Oxford OX1 3RH ), AM(Department of Astrophysics, University of New South Wales, Sydney, NSW 2052, Australia ), AN(School of Physics and Astronomy, North Haugh, St Andrews, Fife KY6 9SS ), AO(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA ), AP(Department of Astronomy, Caltech, Pasadena, CA 91125, USA ), AQ(Department of Physics, South Road, Durham DH1 3LE ), AR(Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218-2686, USA ), AS(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA ), AT(Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia ), AU(Department of Physics, University of Leeds, Woodhouse Lane, Leeds LS2 9JT ), AV(School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD ), AW(Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA ), AX(Department of Physics, South Road, Durham DH1 3LE ), AY(Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ), AZ(Research School of Astronomy and Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia ), BA(Department of Physics, Keble Road, Oxford OX1 3RH ), BB(Department of Astronomy, Caltech, Pasadena, CA 91125, USA )
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 329, Issue 1, pp. 227-245. (MNRAS Homepage)
Publication Date:
01/2002
Origin:
MNRAS
MNRAS Keywords:
GALAXIES: ACTIVE, GALAXIES: LUMINOSITY FUNCTION, MASS FUNCTION, GALAXIES: STARBURST, RADIO CONTINUUM: GALAXIES
DOI:
10.1046/j.1365-8711.2002.04998.x
Bibliographic Code:
2002MNRAS.329..227S

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 325deg2 (about 20 per cent 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 identifications - 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 per cent) and star-forming galaxies (40 per cent). About 25 per cent of the 2dFGRS radio sources are spatially resolved by NVSS, and the sample includes three giant radio galaxies with projected linear size greater than 1Mpc. The high quality of the 2dF spectra means we can usually distinguish unambiguously between AGN and star-forming galaxies. We make a new determination of the local radio luminosity function at 1.4GHz for both active and star-forming galaxies, and derive a local star formation density of 0.022+/-0.004Msolaryr-1Mpc-3 (H0=50kms-1Mpc-1).

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