Mathematics – Probability
Scientific paper
Jun 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...222..412b&link_type=abstract
Astrophysical Journal, Part 1, vol. 222, June 1, 1978, p. 412-420.
Mathematics
Probability
18
Angular Distribution, Astronomical Models, Cosmology, Galactic Clusters, Spatial Distribution, Angular Correlation, Density Distribution, Many Body Problem, Mass Distribution
Scientific paper
A catalog of galactic clusters is generated by the following criterion: regions of the sky in which the surface number density of galaxies is enhanced by a factor of 4.65 over the mean surface density. Attention is given to the correlation function (or angular covariance function), which is defined in terms of the probability of finding a given galaxy at a specific angular distance from a chosen galaxy. Many of the galaxies observed occur in tight pairs, which may be evidence of the instability of a three-body system. It is noted that the model is consistent with a simple hierarchical clustering model.
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