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Radio sources in the 2dF Galaxy Redshift Survey - II. Local radio luminosity functions for AGN and star-forming galaxies at 1.4 GHz

Sadler, Elaine M. and Jackson, Carole A. and Cannon, Russell D. and McIntyre, Vincent J. and Murphy, Tara and Bland-Hawthorn, Joss and Bridges, Terry and Cole, Shaun and Colless, Matthew and Collins, Chris and Couch, Warrick and Dalton, Gavin and De Propris, Roberto and Driver, Simon P. and Efstathiou, George and Ellis, Richard S. and Frenk, Carlos S. and Glazebrook, Karl and Lahav, Ofer and Lewis, Ian and Lumsden, Stuart and Maddox, Steve and Madgwick, Darren and Norberg, Peder and Peacock, John A. and Peterson, Bruce A. and Sutherland, Will and Taylor, Keith (2002) Radio sources in the 2dF Galaxy Redshift Survey - II. Local radio luminosity functions for AGN and star-forming galaxies at 1.4 GHz. Monthly Notices of the Royal Astronomical Society, 329 (1). pp. 227-245. ISSN 0035-8711. doi:10.1046/j.1365-8711.2002.04998.x.

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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).

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URLURL TypeDescription Paper
Bland-Hawthorn, Joss0000-0001-7516-4016
Ellis, Richard S.0000-0001-7782-7071
Norberg, Peder0000-0002-5875-0440
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.
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Subject Keywords:galaxies: active, galaxies: luminosity function, mass function, galaxies: starburst, radio continuum: galaxies
Issue or Number:1
Record Number:CaltechAUTHORS:20200601-103013889
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Official Citation:Elaine M. Sadler, Carole A. Jackson, Russell D. Cannon, Vincent J. McIntyre, Tara Murphy, Joss Bland-Hawthorn, Terry Bridges, Shaun Cole, Matthew Colless, Chris Collins, Warrick Couch, Gavin Dalton, Roberto de Propris, Simon P. Driver, George Efstathiou, Richard S. Ellis, Carlos S. Frenk, Karl Glazebrook, Ofer Lahav, Ian Lewis, Stuart Lumsden, Steve Maddox, Darren Madgwick, Peder Norberg, John A. Peacock, Bruce A. Peterson, Will Sutherland, Keith Taylor, Radio sources in the 2dF Galaxy Redshift Survey – II. Local radio luminosity functions for AGN and star-forming galaxies at 1.4 GHz, Monthly Notices of the Royal Astronomical Society, Volume 329, Issue 1, January 2002, Pages 227–245,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103589
Deposited By: George Porter
Deposited On:01 Jun 2020 20:47
Last Modified:16 Nov 2021 18:23

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