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

@misc{citeulike:461843, abstract = {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 \Omega\_m h = 0.20 +/- 0.03, and the baryon fraction \Omega\_b/\Omega\_m = 0.15 +/- 0.07, assuming scale-invariant primordial fluctuations.}, archivePrefix = {arXiv}, author = {Percival, Will J. and Baugh, Carlton M. and Bland-Hawthorn, Joss and Bridges, Terry and Cannon, Russell and Cole, Shaun and Colless, Matthew and Collins, Chris and Couch, Warrick and Dalton, Gavin and De Propris, Roberto and Driver, Simon P. and Efstathiou, George and Ellis, Richard S. and Frenk, Carlos S. and Glazebrook, Karl and Jackson, Carole and Lahav, Ofer and Lewis, Ian and Lumsden, Stuart and Maddox, Steve and Moody, Stephen and Norberg, Peder and Peacock, John A. and Peterson, Bruce A. and Sutherland, Will and Taylor, Keith}, citeulike-article-id = {461843}, citeulike-linkout-0 = {http://arxiv.org/abs/astro-ph/0105252}, citeulike-linkout-1 = {http://arxiv.org/pdf/astro-ph/0105252}, day = {15}, eprint = {astro-ph/0105252}, keywords = {2df, astrophysics, cosmology}, month = {May}, posted-at = {2006-01-11 09:50:59}, priority = {3}, title = {The 2dF Galaxy Redshift Survey: The power spectrum and the matter content of the universe}, url = {http://arxiv.org/abs/astro-ph/0105252}, year = {2001} }

TY - ELEC ID - citeulike:461843 L3 - citeulike-article-id:461843 N2 - 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 \Omega_m h = 0.20 +/- 0.03, and the baryon fraction \Omega_b/\Omega_m = 0.15 +/- 0.07, assuming scale-invariant primordial fluctuations. TI - The 2dF Galaxy Redshift Survey: The power spectrum and the matter content of the universe KW - 2df KW - astrophysics KW - cosmology AU - Percival, Will AU - Baugh, Carlton AU - Bland-Hawthorn, Joss AU - Bridges, Terry AU - Cannon, Russell AU - Cole, Shaun AU - Colless, Matthew AU - Collins, Chris AU - Couch, Warrick AU - Dalton, Gavin AU - De Propris, Roberto AU - Driver, Simon AU - Efstathiou, George AU - Ellis, Richard AU - Frenk, Carlos AU - Glazebrook, Karl AU - Jackson, Carole AU - Lahav, Ofer AU - Lewis, Ian AU - Lumsden, Stuart AU - Maddox, Steve AU - Moody, Stephen AU - Norberg, Peder AU - Peacock, John AU - Peterson, Bruce AU - Sutherland, Will AU - Taylor, Keith PY - 2001/May/15/ UR - http://arxiv.org/abs/astro-ph/0105252 ER -