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

John A. Peacock; Shaun Cole; Peder Norberg; Carlton M. Baugh; Joss Bland-Hawthorn; Terry Bridges; Russell D. Cannon; Matthew Colless; Chris Collins; Warrick Couch; Gavin Dalton; Kathryn Deeley; 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; Will J. Percival; Bruce A. Peterson; Ian Price; Will Sutherland; Keith Taylor

doi:10.1038/35065528

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

John A. Peacock, Shaun Cole, Peder Norberg, Carlton M. Baugh, Joss Bland-Hawthorn, Terry Bridges, Russell D. Cannon, Matthew Colless, Chris Collins, Warrick Couch, Gavin Dalton, Kathryn Deeley, Roberto De Propris, Simon P. Driver, George Efstathiou, Richard S. Ellis, Carlos S. Frenk, Karl Glazebrook, Carole Jackson, Ofer LahavIan Lewis, Stuart Lumsden, Steve Maddox, Will J. Percival, Bruce A. Peterson, Ian Price, Will Sutherland, Keith Taylor

International Centre for Radio Astronomy Research (ICRAR)

Research output: Contribution to journal › Article › peer-review

528 Citations (Scopus)

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.

Original language	English
Pages (from-to)	169-173
Number of pages	5
Journal	Nature
Volume	410
Issue number	6825
DOIs	https://doi.org/10.1038/35065528
Publication status	Published - 8 Mar 2001

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Peacock, J. A., Cole, S., Norberg, P., Baugh, C. M., Bland-Hawthorn, J., Bridges, T., Cannon, R. D., Colless, M., Collins, C., Couch, W., Dalton, G., Deeley, K., De Propris, R., Driver, S. P., Efstathiou, G., Ellis, R. S., Frenk, C. S., Glazebrook, K., Jackson, C., ... Taylor, K. (2001). A measurement of the cosmological mass density from clustering in the 2dF galaxy redshift survey. Nature, 410(6825), 169-173. https://doi.org/10.1038/35065528

@article{a5c2cb48060e47269f97051e0b0e75ad,

title = "A measurement of the cosmological mass density from clustering in the 2dF galaxy redshift survey",

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 = Ω0.6/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.",

author = "Peacock, {John A.} and Shaun Cole and Peder Norberg and Baugh, {Carlton M.} and Joss Bland-Hawthorn and Terry Bridges and Cannon, {Russell D.} and Matthew Colless and Chris Collins and Warrick Couch and Gavin Dalton and Kathryn Deeley and {De Propris}, Roberto and Driver, {Simon P.} and George Efstathiou and Ellis, {Richard S.} and Frenk, {Carlos S.} and Karl Glazebrook and Carole Jackson and Ofer Lahav and Ian Lewis and Stuart Lumsden and Steve Maddox and Percival, {Will J.} and Peterson, {Bruce A.} and Ian Price and Will Sutherland and Keith Taylor",

year = "2001",

month = mar,

day = "8",

doi = "10.1038/35065528",

language = "English",

volume = "410",

pages = "169--173",

journal = "Nature",

issn = "0028-0836",

publisher = "Nature Publishing Group - Macmillan Publishers",

number = "6825",

}

Peacock, JA, Cole, S, Norberg, P, Baugh, CM, Bland-Hawthorn, J, Bridges, T, Cannon, RD, Colless, M, Collins, C, Couch, W, Dalton, G, Deeley, K, De Propris, R, Driver, SP, Efstathiou, G, Ellis, RS, Frenk, CS, Glazebrook, K, Jackson, C, Lahav, O, Lewis, I, Lumsden, S, Maddox, S, Percival, WJ, Peterson, BA, Price, I, Sutherland, W & Taylor, K 2001, 'A measurement of the cosmological mass density from clustering in the 2dF galaxy redshift survey', Nature, vol. 410, no. 6825, pp. 169-173. https://doi.org/10.1038/35065528

TY - JOUR

T1 - A measurement of the cosmological mass density from clustering in the 2dF galaxy redshift survey

AU - Peacock, John A.

AU - Cole, Shaun

AU - Norberg, Peder

AU - Baugh, Carlton M.

AU - Bland-Hawthorn, Joss

AU - Bridges, Terry

AU - Cannon, Russell D.

AU - Colless, Matthew

AU - Collins, Chris

AU - Couch, Warrick

AU - Dalton, Gavin

AU - Deeley, Kathryn

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 - Percival, Will J.

AU - Peterson, Bruce A.

AU - Price, Ian

AU - Sutherland, Will

AU - Taylor, Keith

PY - 2001/3/8

Y1 - 2001/3/8

N2 - 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 = Ω0.6/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.

AB - 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 = Ω0.6/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.

UR - http://www.scopus.com/inward/record.url?scp=0035826144&partnerID=8YFLogxK

U2 - 10.1038/35065528

DO - 10.1038/35065528

M3 - Article

C2 - 11242069

AN - SCOPUS:0035826144

VL - 410

SP - 169

EP - 173

JO - Nature

JF - Nature

SN - 0028-0836

IS - 6825

ER -

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

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