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

Percival, Will J. and Baugh, C. M. and Bland-Hawthorn, J. and Bridges, T. and Cannon, R. and Cole, S. and Colless, M. and Collins, C. and Couch, W. and Dalton, G. and De Propris, R. and Driver, S. P. and Efstathiou, G. and Ellis, Richard S. and Frenk, C. S. and Glazebrook, K. and Jackson, C. and Lahav, O. and Lewis, I. and Lumsden, S. and Maddox, S. and Moody, S. and Norberg, P. and Peacock, J. A. and Peterson, B. A. and Sutherland, W. and Taylor, Keith (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). pp. 1297-1306. ISSN 0035-8711. doi:10.1046/j.1365-8711.2001.04827.x.

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The 2dF Galaxy Redshift Survey has now measured in excess of 160000 galaxy redshifts. This paper presents the power spectrum of the galaxy distribution, calculated using a direct FFT-based technique. We argue that, within the k-space region 0.02 ≾ k ≾ 0.15 h Mpc⁻¹, 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 analyzed 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% confidence limits on the total matter density times the Hubble parameter Ω_mh = 0.20 ± 0.03, and the baryon fraction Ω_b/Ω_m = 0.15 ± 0.07, assuming scale-invariant primordial fluctuations.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Bland-Hawthorn, J.0000-0001-7516-4016
Colless, M.0000-0001-9552-8075
Ellis, Richard S.0000-0001-7782-7071
Norberg, P.0000-0002-5875-0440
Additional Information:© 2001 RAS. Accepted 2001 July 16. Received 2001 July 11; in original form 2001 May 17. The 2dF Galaxy Redshift Survey was made possible through the dedicated efforts of the staff of the Anglo-Australian Observatory, both in creating the 2dF instrument and in supporting it on the telescope.
Subject Keywords:cosmological parameters, large-scale structure of Universe
Issue or Number:4
Record Number:CaltechAUTHORS:20200601-143023589
Persistent URL:
Official Citation:Will J. Percival, Carlton M. Baugh, Joss Bland-Hawthorn, Terry Bridges, Russell Cannon, Shaun Cole, Matthew Colless, Chris Collins, Warrick Couch, Gavin Dalton, Roberto De Propris, Simon P. Driver, George Efstathiou, Richard S. Ellis, Carlos S. Frenk, Karl Glazebrook, Carole Jackson, Ofer Lahav, Ian Lewis, Stuart Lumsden, Steve Maddox, Stephen Moody, Peder Norberg, John A. Peacock, Bruce A. Peterson, Will Sutherland, Keith Taylor, The 2dF Galaxy Redshift Survey: the power spectrum and the matter content of the Universe, Monthly Notices of the Royal Astronomical Society, Volume 327, Issue 4, November 2001, Pages 1297–1306,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103606
Deposited By: George Porter
Deposited On:01 Jun 2020 22:42
Last Modified:16 Nov 2021 18:23

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