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The 2dF Galaxy Redshift Survey: hierarchical galaxy clustering

Baugh, C. M. ; Croton, D. J. ; Gaztañaga, E. ; Norberg, P. ; Colless, M. ; Baldry, I. K. ; Bland-Hawthorn, J. ; Bridges, T. ; Cannon, R. ; Cole, S. ; Collins, C. ; Couch, W. ; Dalton, G. ; De Propris, R. ; Driver, S. P. ; Efstathiou, G. ; Ellis, R. S. ; Frenk, C. S. ; Glazebrook, K. ; Jackson, C. ; Lahav, O. ; Lewis, I. ; Lumsden, S. ; Maddox, S. ; Madgwick, D. ; Peacock, J. A. ; Peterson, B. A. ; Sutherland, W. ; Taylor, K.

In: Monthly Notices of the Royal Astronomical Society, 2004, vol. 351, no. 2, p. L44-L48

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    Titre
    • The 2dF Galaxy Redshift Survey: hierarchical galaxy clustering
    Auteur
    • Baugh, C. M.. Department of Physics, University of Durham, South Road, Durham DH1 3LE
    • Croton, D. J.. Max-Planck-Institut für Astrophysik, D-85740 Garching, Germany
    • Gaztañaga, E.. INAOE, Astrofisica, Tonantzintla, Apdo Postal 216 y 51, Puebla 7200, Mexico
    • Norberg, P.. ETHZ Institut für Astronomie, HPF G3.1, ETH Hönggerberg, CH-8093 Zürich, Switzerland
    • Colless, M.. Anglo-Australian Observatory, PO Box 296, Epping, NSW 2111, Australia
    • Baldry, I. K.. Department of Physics & Astronomy, Johns Hopkins University, Baltimore, MD 21118-2686, USA
    • Bland-Hawthorn, J.. Anglo-Australian Observatory, PO Box 296, Epping, NSW 2111, Australia
    • Bridges, T.. Anglo-Australian Observatory, PO Box 296, Epping, NSW 2111, Australia
    • Cannon, R.. Anglo-Australian Observatory, PO Box 296, Epping, NSW 2111, Australia
    • Cole, S.. Department of Physics, University of Durham, South Road, Durham DH1 3LE
    • Collins, C.. Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Birkenhead L14 1LD
    • Couch, W.. Department of Astrophysics, University of New South Wales, Sydney, NSW 2052, Australia
    • Dalton, G.. Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH
    • De Propris, R.. Research School of Astronomy & Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
    • Driver, S. P.. Research School of Astronomy & Astrophysics, The Australian National University, Weston Creek, ACT 2611, Australia
    • Efstathiou, G.. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA
    • Ellis, R. S.. Department of Astronomy, California Institute of Technology, Pasadena, CA 91025, USA
    • Frenk, C. S.. Department of Physics, University of Durham, South Road, Durham DH1 3LE
    • Glazebrook, K.. Department of Physics & Astronomy, Johns Hopkins University, Baltimore, MD 21118-2686, USA
    • Jackson, C.. CSIRO Australia Telescope National Facility, PO Box 76, Epping, NSW 1710, Australia
    • Lahav, O.. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA
    • Lewis, I.. Department of Physics, University of Oxford, Keble Road, Oxford OX1 3RH
    • Lumsden, S.. Department of Physics, University of Leeds, Woodhouse Lane, Leeds LS2 9JT
    • Maddox, S.. School of Physics & Astronomy, University of Nottingham, Nottingham NG7 2RD
    • Madgwick, D.. Department of Astronomy, University of California, Berkeley, CA 94720, USA
    • Peacock, J. A.. Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ
    • Peterson, B. A.. Anglo-Australian Observatory, PO Box 296, Epping, NSW 2111, Australia
    • Sutherland, W.. Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA
    • Taylor, K.. Department of Astronomy, California Institute of Technology, Pasadena, CA 91025, USA
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Monthly Notices of the Royal Astronomical Society, 2004, vol. 351, no. 2, p. L44-L48. Blackwell Science Ltd
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:297829
    Summary
    We use the Two-Degree Field Galaxy Redshift Survey (2dFGRS) to test the hierarchical scaling hypothesis: namely, that the p-point galaxy correlation functions can be written in terms of the two-point correlation function or variance. This scaling is expected if an initially Gaussian distribution of density fluctuations evolves under the action of gravitational instability. We measure the volume-averaged p-point correlation functions using a counts-in-cells technique applied to a volume-limited sample of 44 931 L* galaxies. We demonstrate that L* galaxies display hierarchical clustering up to order p= 6 in redshift space. The variance measured for L* galaxies is in excellent agreement with the predictions from a Λ-cold dark matter N-body simulation. This applies to all cell radii considered, 0.3 < (R/h−1 Mpc) < 30. However, the higher order correlation functions of L* galaxies have a significantly smaller amplitude than is predicted for the dark matter for R < 10 h−1 Mpc. This disagreement implies that a non-linear bias exists between the dark matter and L* galaxies on these scales. We also show that the presence of two rare, massive superclusters in the 2dFGRS has an impact on the higher-order clustering moments measured on large scales