Are galaxies more strongly correlated than clusters?

Details Are galaxies more strongly correlated than clusters? Are galaxies more strongly correlated than clusters?

Apr 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985natur.314..718s&link_type=abstract

Nature (ISSN 0028-0836), vol. 314, April 25, 1985, p. 718, 719. Research supported by the U.S. Department of Energy, NSF, and NA

Statistics

Computation

101

Cosmology, Galactic Clusters, Universe, Computational Astrophysics, Correlation, Gravitational Effects, Spatial Distribution

Scientific paper

One of the most powerful tools used in attempts to understand the structure of the universe is the correlation function ξ(r), the excess probability over random that there are two objects separated by a distance r. In particular, distributions of galaxies and of clusters of galaxies have been investigated using this parameter. The authors show that if the amplitudes of the cluster-cluster correlation function is made dimensionless, systematic changes with cluster richness vanish, implying scale invariance in the clustering process. The dimensionless galaxy-galaxy correlation seems stronger, implying gravitational enhancement on smaller scales.

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