Details

Autor(en) / Beteiligte

• Percival, Will J.
• Baugh, Carlton M.
• Bland-Hawthorn, Joss
• Bridges, Terry
• Cannon, Russell
• Cole, Shaun
• Colless, Matthew
• Collins, Chris
• Couch, Warrick
• Dalton, Gavin
• De Propris, Roberto
• Driver, Simon P.
• Efstathiou, George
• Ellis, Richard S.
• Frenk, Carlos S.
• Glazebrook, Karl
• Jackson, Carole
• Lahav, Ofer
• Lewis, Ian
• Lumsden, Stuart
• Maddox, Steve
• Moody, Stephen
• Norberg, Peder
• Peacock, John A.
• Peterson, Bruce A.
• Sutherland, Will
• Taylor, Keith

Titel

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

Ist Teil von

• Monthly notices of the Royal Astronomical Society, 2001-11, Vol.327 (4), p.1297-1306

Ort / Verlag

Oxford, UK: Blackwell Science Ltd

Erscheinungsjahr

2001

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• 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 , 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 , and the baryon fraction , assuming scale-invariant primordial fluctuations.