TY - JOUR
T1 - The 2dF Galaxy Redshift Survey
T2 - Spherical harmonics analysis of fluctuations in the final catalogue
AU - Percival, Will J.
AU - Burkey, Daniel
AU - Heavens, Alan
AU - Taylor, Andy
AU - Cole, Shaun
AU - Peacock, John A.
AU - Baugh, Carlton M.
AU - Bland-Hawthorn, Joss
AU - Bridges, Terry
AU - Cannon, Russell
AU - Colless, Matthew
AU - Collins, Chris
AU - Couch, Warrick
AU - Dalton, Gavin
AU - De Propris, Roberto
AU - Driver, Simon P.
AU - Efstathiou, George
AU - Ellis, Richard S.
AU - Frenk, Carlos S.
AU - Glazebrook, Karl
AU - Jackson, Carole
AU - Lahav, Ofer
AU - Lewis, Ian
AU - Lumsden, Stuart
AU - Maddox, Steve
AU - Norberg, Peder
AU - Peterson, Bruce A.
AU - Sutherland, Will
AU - Taylor, Keith
PY - 2004/10/1
Y1 - 2004/10/1
N2 - We present the result of a decomposition of the 2dF Galaxy Redshift Survey (2dFGRS) galaxy overdensity field into an orthonormal basis of spherical harmonics and spherical Bessel functions. Galaxies are expected to directly follow the bulk motion of the density field on large scales, so the absolute amplitude of the observed large-scale redshift-space distortions caused by this motion is expected to be independent of galaxy properties. By splitting the overdensity field into radial and angular components, we linearly model the observed distortion and obtain the cosmological constraint Ω m0.6σ8 = 0.46 ± 0.06. The amplitude of the linear redshift-space distortions relative to the galaxy overdensity field is dependent on galaxy properties and, for L* galaxies at redshift z = 0, we measure β(L*, 0) = 0.58 ± 0.08, and the amplitude of the overdensity fluctuations b(L *, 0)σ8 = 0.79 ± 0.03, marginalizing over the power spectrum shape parameters. Assuming a fixed power spectrum shape consistent with the full Fourier analysis produces very similar parameter constraints.
AB - We present the result of a decomposition of the 2dF Galaxy Redshift Survey (2dFGRS) galaxy overdensity field into an orthonormal basis of spherical harmonics and spherical Bessel functions. Galaxies are expected to directly follow the bulk motion of the density field on large scales, so the absolute amplitude of the observed large-scale redshift-space distortions caused by this motion is expected to be independent of galaxy properties. By splitting the overdensity field into radial and angular components, we linearly model the observed distortion and obtain the cosmological constraint Ω m0.6σ8 = 0.46 ± 0.06. The amplitude of the linear redshift-space distortions relative to the galaxy overdensity field is dependent on galaxy properties and, for L* galaxies at redshift z = 0, we measure β(L*, 0) = 0.58 ± 0.08, and the amplitude of the overdensity fluctuations b(L *, 0)σ8 = 0.79 ± 0.03, marginalizing over the power spectrum shape parameters. Assuming a fixed power spectrum shape consistent with the full Fourier analysis produces very similar parameter constraints.
KW - Cosmological parameters
KW - Large-scale structure of Universe
UR - http://www.scopus.com/inward/record.url?scp=5644288803&partnerID=8YFLogxK
U2 - 10.1111/j.1365-2966.2004.08146.x
DO - 10.1111/j.1365-2966.2004.08146.x
M3 - Review article
SN - 0035-8711
VL - 353
SP - 1201
EP - 1218
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -