The 2dF Galaxy Redshift Survey: Wiener reconstruction of the cosmic web

Author(s)

Erdogdu, Pirin; Lahav, Ofer; Zaroubi, Saleem; Efstathiou, George P.; Moody, Stephen J.; Peacock, John A.; Colless, Matthew; Baldry, Ivan K.; Baugh, Carlton; 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.; Ellis, Richard S.; Frenk, Carlos S.; Glazebrook, Karl; Jackson, C. A.; Lewis, Ian; Lumsden, Stuart; Maddox, Stephen J.; Madgwick, Darren; Norberg, Peder; Peterson, Bruce A.; Sutherland, William J.; Taylor, Keith

Available versions

Abstract

We reconstruct the underlying density field of the Two-degree Field Galaxy Redshift Survey (2dFGRS) for the redshift range 0.035 < z < 0.200 using the Wiener filtering method. The Wiener filter suppresses shot noise and accounts for selection and incompleteness effects. The method relies on prior knowledge of the 2dF power spectrum of fluctuations and the combination of matter density and bias parameters, however the results are only slightly affected by changes to these parameters. We present maps of the density field. We use a variable smoothing technique with two different effective resolutions: 5 and 10 h-1 Mpc at the median redshift of the survey. We identify all major superclusters and voids in the survey. In particular, we find two large superclusters and two large local voids.

Publication year

2004

Publication type

Journal article

Source

Monthly Notices of the Royal Astronomical Society, Vol. 352, no. 3 (Aug 2004), pp. 939-960

ISSN

0035-8711

Publisher

Wiley

Copyright

Copyright © 2004 RAS.

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