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

被引：209

作者：

Percival, WJ

Burkey, D

Heavens, A

Taylor, A

Cole, S

Peacock, JA

Baugh, CM

Bland-Hawthorn, J

Bridges, T

Cannon, R

Colless, M

Collins, C

Couch, W

Dalton, G

De Propris, R

Driver, SP

Efstathiou, G

Ellis, RS

Frenk, CS

Glazebrook, K

Jackson, C

Lahav, O

Lewis, I

Lumsden, S

Maddox, S

Norberg, P

Peterson, BA

Sutherland, W

Taylor, K

机构：

[1] Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland

[2] Univ Durham, Dept Phys, Durham DH1 3LE, England

[3] Anglo Australian Observ, Epping, NSW 2121, Australia

[4] Queens Univ, Dept Phys, Kingston, ON K7L 3N6, Canada

[5] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead L14 1LD, Merseyside, England

[6] Univ New S Wales, Dept Astrophys, Sydney, NSW 2052, Australia

[7] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[8] Rutherford Appleton Lab, Space Sci & Technol Div, Didcot OX11 0QX, Oxon, England

[9] Australian Natl Univ, Res Sch Astron & Astrophys, Weston, ACT 2611, Australia

[10] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

[11] CALTECH, Dept Astron, Pasadena, CA 91125 USA

[12] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[13] CSIRO, Australia Telescope Natl Facil, Epping, NSW 1710, Australia

[14] UCL, Dept Phys & Astron, London WC1E 6BT, England

[15] Univ Leeds, Dept Phys, Leeds LS2 9JT, W Yorkshire, England

[16] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England

[17] ETH Honggerberg, ETHZ Inst Astron, CH-8093 Zurich, Switzerland

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2004年 / 353卷 / 04期

关键词：

cosmological parameters; large-scale structure of Universe;

D O I：

10.1111/j.1365-2966.2004.08146.x

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 Omega(m)(0.6)sigma(8)=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 beta(L-*, 0)=0.58+/-0.08, and the amplitude of the overdensity fluctuations b(L-*, 0)sigma(8)=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.

引用

页码：1201 / 1218

页数：18

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