The Scale of Galaxy Clustering and the Mean Matter Density of the Universe
Open Access
- 1 July 1975
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 172 (1) , 23P-26P
- https://doi.org/10.1093/mnras/172.1.23p
Abstract
The correlation energy computed from Peebles' power-law galaxy covariance function suggests that, if the gravitational instability picture is correct, then there must be a feature in the covariance function where it steepens. The scale of this cut-off cannot be accurately determined by this argument but a comparison of the random kinetic energies of galaxies with their correlation energy gives an estimate of the mean matter density of the Universe. The suggested value is less than 5 per cent of the closure density if most matter is distributed as galaxies are.Keywords
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