Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/42753

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Title

The 2dF Galaxy Redshift Survey: higher-order galaxy correlation functions

Author(s)

Croton, Darren J.;  Gaztanaga, Enrique;  Baugh, Carlton;  Norberg, Peder;  Colless, Matthew;  Baldry, Ivan K.;  Bland-Hawthorn, Joss;  Bridges, Terry J.;  Cannon, Russell D.;  Cole, Shaun;  Collins, Chris A.;  Couch, Warrick J.;  Dalton, Gavin B.;  De Propris, Roberto;  Driver, Simon P.;  Efstathiou, George P.;  Ellis, Richard S.;  Frenk, Carlos S.;  Glazebrook, Karl;  Jackson, C. A.;  Lahav, Ofer;  Lewis, Ian;  Lumsden, Stuart;  Maddox, Stephen J.;  Madgwick, Darren;  Peacock, J. A.;  Peterson, Bruce A.;  Sutherland, William J.;  Taylor, Keith

Abstract

We measure moments of the galaxy count probability distribution function in the Two-degree Field Galaxy Redshift Survey (2dFGRS). The survey is divided into volume-limited subsamples in order to examine the dependence of the higher-order clustering on galaxy luminosity. We demonstrate the hierarchical scaling of the averaged p-point galaxy correlation functions, ξ̄p, up to p = 6. The hierarchical amplitudes, Sp = S2Sp-1, are approximately independent of the cell radius used to smooth the galaxy distribution on small to medium scales. On larger scales we find that the higher-order moments can be strongly affected by the presence of rare, massive superstructures in the galaxy distribution. The skewness S3 has a weak dependence on luminosity, approximated by a linear dependence on log luminosity. We discuss the implications of our results for simple models of linear and non-linear bias that relate the galaxy distribution to the underlying mass.

Publication type

Journal article

Source

Monthly Notices of the Royal Astronomical Society, Vol. 352, no. 4 (Aug 2004), pp. 1232-1244

Publication year

2004

Keyword(s)

APM;  Background power spectrum;  Conditions;  Cosmological perturbation-theory;  Cosmology theory;  Density;  Digital sky survey;  Galaxies;  Gaussian initial;  Large-scale structure;  Luminosity dependence;  Matter;  Probe;  Spherical collapse model;  Statistics;  Universe;  WMAP observations

Publisher

Wiley-Blackwell Publishing

ISSN

0035-8711

Publisher URL

http://dx.doi.org/10.1111/j.1365-2966.2004.08017.x

Copyright

Copyright © 2004 Royal Astronomical Society. Accepted manuscript reproduced here in accordance with the copyright policy of the publisher. The definitive publication is available at www.interscience.wiley.com.

Full text

Peer reviewed