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.

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
• Public URL: https://durham-repository.worktribe.com/output/1508817
• Publisher URL: http://adsabs.harvard.edu/abs/2001MNRAS.327.1297P