Research articles

search articles

My Pages

Stat

Members: 3645
Articles: 2'503'724
Articles rated: 2609

24 April 2024

» pubmed » pmid11242069

Article overview

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 Bl ; -Hawthorn ; T Bridges ; R D Cannon ; M Colless ; 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 Sutherl ; K Taylor ;
Date:	8 Mar 2001
Journal:	Nature, 410 (6825), 169-73
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 beta = Omega0.6/b = 0.43 +/- 0.07, where Omega 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 favour a low-density Universe with Omega approximately 0.3.
Source:	PubMed, pmid11242069 doi: 10.1038/35065528
Services:	Forum \| Review \| Favorites

No review found.

Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

ScienXe.org
» my Online CV
» Free

News, job offers and information for researchers and scientists:

home

contact

sitemap