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The 2dF galaxy redshift survey: clustering properties of radio galaxies

Magliocchetti, Manuela ; Maddox, Steve J. ; Hawkins, Ed ; Peacock, John A. ; Bland-Hawthorn, Joss ; Bridges, Terry ; Cannon, Russell ; Cole, Shaun ; Colless, Matthew ; Collins, Chris ; Couch, Warrick ; Dalton, Gavin ; Propris, Roberto de ; Driver, Simon P. ; Efstathiou, George ; Ellis, Richard S. ; S. Frenk, Carlos ; Glazebrook, Karl ; Jackson, Carole A. ; Jones, Bryn ; Lahav, Ofer ; Lewis, Ian ; Lumsden, Stuart ; Norberg, Peder ; Peterson, Bruce A. ; Sutherland, Will ; Taylor, Keith

In: Monthly Notices of the Royal Astronomical Society, 2004, vol. 350, no. 4, p. 1485-1494

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    Titre
    • The 2dF galaxy redshift survey: clustering properties of radio galaxies
    Auteur
    • Magliocchetti, Manuela. SISSA, Via Beirut 4, 34100, Trieste, Italy
    • Maddox, Steve J.. School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD
    • Hawkins, Ed. School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD
    • Peacock, John A.. Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Bland-Hawthorn, Joss. Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
    • Bridges, Terry. Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
    • Cannon, Russell. Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
    • Cole, Shaun. Department of Physics, University of Durham, South Road, Durham DH1 3LE
    • Colless, Matthew. Research School of Astronomy and Astrophysics, The Australian National University, Canberra, ACT 2611, Australia
    • Collins, Chris. Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Birkenhead, L14 1LD
    • Couch, Warrick. Department of Astrophysics, University of New South Wales, Sydney, NSW 2052, Australia
    • Dalton, Gavin. Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH
    • Propris, Roberto de. Department of Astrophysics, University of New South Wales, Sydney, NSW 2052, Australia
    • Driver, Simon P.. School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY6 9SS
    • Efstathiou, George. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA
    • Ellis, Richard S.. Department of Astronomy, California Institute of Technology, Pasadena, CA 91125
    • S. Frenk, Carlos. Department of Physics, University of Durham, South Road, Durham DH1 3LE
    • Glazebrook, Karl. Department of Physics and Astronomy, Johns Hopkins University, Baltimore, MD 21218-2686, USA
    • Jackson, Carole A.. Research School of Astronomy and Astrophysics, The Australian National University, Canberra, ACT 2611, Australia
    • Jones, Bryn. Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Lahav, Ofer. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA
    • Lewis, Ian. Department of Physics, University of Durham, South Road, Durham DH1 3LE
    • Lumsden, Stuart. Department of Physics, University of Leeds, Woodhouse Lane, Leeds LS2 9JT
    • Norberg, Peder. ETHZ Institut für Astronomie, HPF G3.1, ETH Hönggerberg, CH-8093 Zürich, Switzerland
    • Peterson, Bruce A.. Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
    • Sutherland, Will. Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Taylor, Keith. Anglo-Australian Observatory, PO Box 296, Epping, NSW 2121, Australia
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Monthly Notices of the Royal Astronomical Society, 2004, vol. 350, no. 4, p. 1485-1494. Blackwell Science Ltd
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:292553
    Summary
    The clustering properties of local, S1.4 GHz≥ 1 mJy, radio sources are investigated for a sample of 820 objects drawn from the joint use of the Faint Images of the Radio Sky at 20 cm (FIRST) and 2dF Galaxy Redshift surveys. To this aim, we present 271 new bJ≤ 19.45 spectroscopic counterparts of FIRST radio sources to be added to those already introduced in our previous paper. The two-point correlation function for the local radio population is found to be entirely consistent with estimates obtained for the whole sample of 2dFGRS galaxies. From measurements of the redshift-space correlation function ξ(s) we derive a redshift-space clustering length s0 = 10.7+0.8 −0.7 Mpc, while from the projected correlation function Ξ(rT) we estimate the parameters of the real-space correlation function ξ(r) = (r/r0) −γ, r0 = 6.7+0.9 −1.1 Mpc and γ= 1.6 ± 0.1, where h = 0.7 is assumed. Different results are instead obtained if we only consider sources that present signatures of active galactic nucleus (AGN) activity in their spectra. These objects are shown to be very strongly correlated, with r0 = 10.9+1.0 −1.2 Mpc and γ= 2 ± 0.1, a steeper slope than has been claimed in other recent works. No difference is found in the clustering properties of radio-AGNs of different radio luminosity. Comparisons with models for ξ(r) show that AGN-fuelled sources reside in dark matter haloes more massive than ∼1013.4 M⊙, higher than the corresponding figure for radio-quiet quasi-stellar objects. This value can be converted into a minimum black hole mass associated with radio-loud, AGN-fuelled objects of MminBH∼ 109 M⊙. The above results then suggest - at least for relatively faint radio objects - the existence of a threshold black hole mass associated with the onset of significant radio activity such as that of radio-loud AGNs; however, once the activity is triggered, there appears to be no evidence for a connection between black hole mass and level of radio output