The 2dF Galaxy Redshift Survey: the amplitudes of fluctuations in the 2dFGRS and the CMB, and implications for galaxy biasing

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

doi:10.1046/j.1365-8711.2002.05485.x

The 2dF Galaxy Redshift Survey: the amplitudes of fluctuations in the 2dFGRS and the CMB, and implications for galaxy biasing

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

Authors

O. Lahav

S.L. Bridle

W.J. Percival

J.A. Peacock

G. Efstathiou

Professor Carlton Baugh c.m.baugh@durham.ac.uk
Professor

J. Bland-Hawthorn

T. Bridges

R. Cannon

Professor Shaun Cole shaun.cole@durham.ac.uk
Director of the Institute for Computational Cosmology

M. Colless

C. Collins

W. Couch

G. Dalton

R. de Propris

S.P. Driver

R.S. Ellis

Professor Carlos Frenk c.s.frenk@durham.ac.uk
Professor

K. Glazebrook

C. Jackson

I. Lewis

S. Lumsden

S. Maddox

D.S. Madgwick

S. Moody

Professor Peder Norberg peder.norberg@durham.ac.uk
Professor

B.A. Peterson

W. Sutherland

K. Taylor

Abstract

We compare the amplitudes of fluctuations probed by the 2dF Galaxy Redshift Survey (2dFGRS) and by the latest measurements of the cosmic microwave background (CMB) anisotropies. By combining the 2dFGRS and CMB data, we find the linear-theory rms mass fluctuations in 8 h−1 Mpc spheres to be σ8m=0.73±0.05 (after marginalization over the matter density parameter Ωm and three other free parameters). This normalization is lower than the COBE normalization and previous estimates from cluster abundance, but it is in agreement with some revised cluster abundance determinations. We also estimate the scale-independent bias parameter of present-epoch Ls=1.9L∗ APM-selected galaxies to be b(Ls,z=0)=1.10±0.08 on comoving scales of 0.02

Citation

Lahav, O., Bridle, S., Percival, W., Peacock, J., Efstathiou, G., Baugh, C., …Taylor, K. (2002). The 2dF Galaxy Redshift Survey: the amplitudes of fluctuations in the 2dFGRS and the CMB, and implications for galaxy biasing. Monthly Notices of the Royal Astronomical Society, 333(4), 961-968. https://doi.org/10.1046/j.1365-8711.2002.05485.x

Journal Article Type	Article
Publication Date	2002-07
Deposit Date	Apr 19, 2011
Journal	Monthly Notices of the Royal Astronomical Society
Print ISSN	0035-8711
Electronic ISSN	1365-2966
Publisher	Royal Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	333
Issue	4
Pages	961-968
DOI	https://doi.org/10.1046/j.1365-8711.2002.05485.x
Public URL	https://durham-repository.worktribe.com/output/1532578