Prof Gavin Dalton: Publications

The 2dF Galaxy Redshift Survey: The population of nearby radio galaxies at the 1 mJy level

(2001)

Authors:

M Magliocchetti, SJ Maddox, CA Jackson, J Bland-Hawthorn, T Bridges, R Cannon, S Cole, M Colless, C Collins, W Couch, G Dalton, R de Propris, SP Driver, G Efstathiou, RS Ellis, CS Frenk, K Glazebrook, O Lahav, I Lewis, S Lumsden, JA Peacock, BA Peterson, W Sutherland, K Taylor

Radio sources in the 2dF Galaxy Redshift Survey - II. Local radio luminosity functions for AGN and star-forming galaxies at 1.4 GHz

(2001)

Authors:

Elaine M Sadler, Carole A Jackson, Russell D Cannon, Vincent J McIntyre, Tara Murphy, J Bland-Hawthorn, T Bridges, S Cole, M Colless, C Collins, W Couch, G Dalton, R De Propris, SP Driver, G Efstathiou, RS Ellis, CS Frenk, K Glazebrook, O Lahav, I Lewis, S Lumsden, S Maddox, D Madgwick, P Norberg, JA Peacock, BA Peterson, W Sutherland, K Taylor

The 2dF Galaxy Redshift Survey: Luminosity dependence of galaxy clustering

(2001)

Authors:

P Norberg, CM Baugh, E Hawkins, S Maddox, JA Peacock, S Cole, CS Frenk, J Bland-Hawthorn, T Bridges, R Cannon, M Colless, C Collins, W Couch, G Dalton, SP Driver, G Efstathiou, RS Ellis, K Glazebrook, C Jackson, O Lahav, I Lewis, S Lumsden, BA Peterson, W Sutherland, K Taylor, the 2dFGRS Team

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

(2001)

Authors:

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

A measurement of the cosmological mass density from clustering in the 2dF galaxy redshift survey

Nature 410:6825 (2001) 169-173

Authors:

JA Peacock, S Cole, P Norberg, CM Baugh, J Bland-Hawthorn, T Bridges, RD Cannon, M Colless, C Collins, W Couch, G Dalton, K Deeley, R De Propris, SP Driver, G Efstathiou, RS Ellis, CS Frenk, K Glazebrook, C Jackson, O Lahav, I Lewis, S Lumsden, S Maddox, WJ Percival, BA Peterson, I Price, W Sutherland, K Taylor

Abstract:

The large-scale structure in the distribution of galaxies is thought to arise from the gravitational instability of small fluctuations in the initial density field of the Universe. A key test of this hypothesis is that forming superclusters of galaxies should generate a systematic infall of other galaxies. This would be evident in the pattern of recessional velocities, causing an anisotropy in the inferred spatial clustering of galaxies. Here we report a precise measurement of this clustering, using the redshifts of more than 141,000 galaxies from the two-degree-field (2dF) galaxy redshift survey. We determine the parameter β = Ω^0.6/b = 0.43 ± 0.07, where Ω is the total mass-density parameter of the Universe and b is a measure of the 'bias' of the luminous galaxies in the survey. (Bias is the difference between the clustering of visible galaxies and of the total mass, most of which is dark.) Combined with the anisotropy of the cosmic microwave background, our results favor a low-density Universe with Ω ≈ 0.3.

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