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The 2dF Galaxy Redshift Survey: the power spectrum and the matter content of the Universe

Percival, W.J.; 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.; Efstathiou, G.; Ellis, R.S.; Frenk, C.S.; Glazebrook, K.; Jackson, C.; Lahav, O.; Lewis, I.; Lumsden, S.; Maddox, S.; Moody, S.; Norberg, P.; Peacock, J.A.; Peterson, B.A.; Sutherland, W.; Taylor, K.

Authors

W.J. Percival

J. Bland-Hawthorn

T. Bridges

R. Cannon

M. Colless

C. Collins

W. Couch

G. Dalton

R. De Propris

S.P. Driver

G. Efstathiou

R.S. Ellis

K. Glazebrook

C. Jackson

O. Lahav

I. Lewis

S. Lumsden

S. Maddox

S. Moody

J.A. Peacock

B.A. Peterson

W. Sutherland

K. Taylor



Abstract

The 2dF Galaxy Redshift Survey has now measured in excess of 160-000 galaxy redshifts. This paper presents the power spectrum of the galaxy distribution, calculated using a direct Fourier transform based technique. We argue that, within the k-space region Graphic, the shape of this spectrum should be close to that of the linear density perturbations convolved with the window function of the survey. This window function and its convolving effect on the power spectrum estimate are analysed in detail. By convolving model spectra, we are able to fit the power-spectrum data and provide a measure of the matter content of the Universe. Our results show that models containing baryon oscillations are mildly preferred over featureless power spectra. Analysis of the data yields 68 per cent confidence limits on the total matter density times the Hubble parameter Graphic, and the baryon fraction Graphic, assuming scale-invariant primordial fluctuations.

Citation

Percival, W., Baugh, C., Bland-Hawthorn, J., Bridges, T., Cannon, R., Cole, S., …Taylor, K. (2001). The 2dF Galaxy Redshift Survey: the power spectrum and the matter content of the Universe. Monthly Notices of the Royal Astronomical Society, 327(4), 1297-1306. https://doi.org/10.1046/j.1365-8711.2001.04827.x

Journal Article Type Article
Publication Date 2001-11
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 327
Issue 4
Pages 1297-1306
DOI https://doi.org/10.1046/j.1365-8711.2001.04827.x
Publisher URL http://adsabs.harvard.edu/abs/2001MNRAS.327.1297P