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The 2dF Galaxy Redshift Survey: spherical harmonics analysis of fluctuations in the final catalogue

Percival, Will J. and Burkey, Daniel and Heavens, Alan and Taylor, Andy and Cole, Shaun and Peacock, John A. and Baugh, Carlton M. and Bland-Hawthorn, Joss and Bridges, Terry and Cannon, Russell 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 Norberg, Peder and Peterson, Bruce A. and Sutherland, Will and Taylor, Keith (2004) The 2dF Galaxy Redshift Survey: spherical harmonics analysis of fluctuations in the final catalogue. Monthly Notices of the Royal Astronomical Society, 353 (4). pp. 1201-1218. ISSN 0035-8711. doi:10.1111/j.1365-2966.2004.08146.x.

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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 Ω⁰.⁶ₘσ₈= 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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Baugh, Carlton M.0000-0002-9935-9755
Bland-Hawthorn, Joss0000-0001-7516-4016
Colless, Matthew0000-0001-9552-8075
Ellis, Richard S.0000-0001-7782-7071
Norberg, Peder0000-0002-5875-0440
Additional Information:© 2004 RAS. Accepted 2004 June 22. Received 2004 June 9; in original form 2004 April 20. The 2dFGRS was made possible through the dedicated efforts of the staff of the Anglo‐Australian Observatory, both in creating the 2dF instrument and in supporting it on the telescope. WJP is supported by PPARC through a Postdoctoral Fellowship. JAP and OL are grateful for the support of PPARC Senior Research Fellowships.
Funding AgencyGrant Number
Particle Physics and Astronomy Research Council (PPARC)UNSPECIFIED
Subject Keywords:cosmological parameters, large‐scale structure of Universe
Issue or Number:4
Record Number:CaltechAUTHORS:20200710-171317586
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Official Citation:Will J. Percival, Daniel Burkey, Alan Heavens, Andy Taylor, Shaun Cole, John A. Peacock, Carlton M. Baugh, Joss Bland‐Hawthorn, Terry Bridges, Russell Cannon, 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, Peder Norberg, Bruce A. Peterson, Will Sutherland, Keith Taylor, The 2dFGRS Team, The 2dF Galaxy Redshift Survey: spherical harmonics analysis of fluctuations in the final catalogue, Monthly Notices of the Royal Astronomical Society, Volume 353, Issue 4, October 2004, Pages 1201–1218,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104343
Deposited By: Rebecca Minjarez
Deposited On:14 Jul 2020 15:39
Last Modified:16 Nov 2021 18:30

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