The 2dF Galaxy Redshift Survey: voids and hierarchical scaling models

Author(s)

Croton, Darren J.; Colless, Matthew; Gaztanaga, Enrique; Baugh, Carlton; Norberg, Peder; 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, John A.; Peterson, Bruce A.; Sutherland, William J.; Taylor, Keith

Available versions

Abstract

We measure the redshift-space reduced void probability function (VPF) for 2dFGRS volume-limited galaxy samples covering the absolute magnitude range MbJ -5log10 h = -18 to -22. Theoretically, the VPF connects the distribution of voids to the moments of galaxy clustering of all orders, and can be used to discriminate clustering models in the weakly nonlinear regime. The reduced VPF measured from the 2dFGRS is in excellent agreement with the paradigm of hierarchical scaling of the galaxy clustering moments. The accuracy of our measurement is such that we can rule out, at a very high significance, popular models for galaxy clustering, including the lognormal distribution. We demonstrate that the negative binomial model gives a very good approximation to the 2dFGRS data over a wide range of scales, out to at least 20 h-1 Mpc. Conversely, the reduced VPF for dark matter in a A cold dark matter ( ACDM) universe does appear to be lognormal on small scales but deviates significantly beyond ∼4 h-1 Mpc. We find little dependence of the 2dFGRS reduced VPF on galaxy luminosity. Our results hold independently in both the North and South Galactic Pole survey regions.

Publication year

2004

Publication type

Journal article

Source

Monthly Notices of the Royal Astronomical Society, Vol. 352, no. 3 (Aug 2004), pp. 828-836

ISSN

0035-8711

Publisher

Wiley

Copyright

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

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