Pith. sign in

REVIEW 5 cited by

A measurement of the cosmological mass density from clustering in the 2dF Galaxy Redshift Survey

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv astro-ph/0103143 v1 pith:6A7L4IEO submitted 2001-03-09 astro-ph

A measurement of the cosmological mass density from clustering in the 2dF Galaxy Redshift Survey

J.A. Peacock , S. Cole , P. Norberg , C.M. Baugh , J. Bland-Hawthorn , T. Bridges , R.D. Cannon , M. Colless
show 20 more authors
C. Collins W. Couch G. Dalton K. Deeley R. De Propris S.P. Driver G. Efstathiou R.S. Ellis C.S. Frenk K. Glazebrook C. Jackson O. Lahav I. Lewis S. Lumsden S. Maddox W.J. Percival B.A. Peterson I. Price W. Sutherland K. Taylor
This is my paper
classification astro-ph
keywords galaxiesclusteringomegasurveyanisotropydensitygalaxymeasurement
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
0 comments
read the original 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 superclusters of galaxies in the process of formation should generate 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 galaxy redshift survey. We determine the parameter beta = Omega^{0.6}/b = 0.43 +- 0.07, where Omega is the total mass-density parameter and b is a measure of the `bias' of the luminous galaxies in the survey. Combined with the anisotropy of the cosmic microwave background, our results favour a low-density universe with Omega approximately 0.3.

discussion (0)

Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.

Forward citations

Cited by 5 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. A Sequentially-Valid Reanalysis of DESI's Dynamical Dark Energy Signal

    astro-ph.CO 2026-07 accept novelty 7.0

    An anytime-valid e-process reanalysis shows DESI's dynamical dark energy evidence is a fragile LRG2-bin, specification-dependent signal that does not survive a trials correction.

  2. DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations

    astro-ph.CO 2024-04 accept novelty 7.0

    First-year DESI BAO data are consistent with flat LambdaCDM and, when combined with CMB, show a 2.5-3.9 sigma preference for evolving dark energy (w0 > -1, wa < 0) that strengthens with certain supernova datasets.

  3. Cosmological inference from the eBOSS QSO full-shape analysis with optimal redshift weights

    astro-ph.CO 2026-06 unverdicted novelty 6.0

    Optimal redshift weighting on eBOSS QSO full-shape data reduces uncertainties on H0 by 43.3%, σ8 by 19.7%, w0 by 20.5% and produces a bounded posterior on wa in the CPL model.

  4. DESI 2024 V: Full-Shape Galaxy Clustering from Galaxies and Quasars

    astro-ph.CO 2024-11 accept novelty 6.0

    DESI DR1 full-shape galaxy clustering constrains Omega_m = 0.296 ± 0.010, H0 = 68.63 ± 0.79 km/s/Mpc, and sigma_8 = 0.841 ± 0.034, consistent with LambdaCDM and Planck.

  5. Towards Bayesian Photometric Cosmic Chronometers: Application to VIPERS

    astro-ph.GA 2026-06 unverdicted novelty 5.0

    Bayesian photometric cosmic chronometer analysis on VIPERS PDR2 data yields H(z=0.65)=93.68±28.27(stat)±10.67(syst) km/s/Mpc, consistent with spectroscopic CC results and Planck ΛCDM, as a proof of concept for photome...