Mathematics – Logic
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...259...20w&link_type=abstract
Astrophysical Journal, Part 1, vol. 259, Aug. 1, 1982, p. 20-24. Research supported by the Natural Sciences and Engineering Res
Mathematics
Logic
6
Astronomical Models, Cosmology, Galactic Clusters, Relativistic Theory, Equations Of State, Statistical Distributions
Scientific paper
A cosmological model describing inhomogeneous clusters of galaxies embedded in a homogeneous background is compared to observation. In this model, a cluster is described as a spherically symmetric distribution of matter with an inverse-square density law and an isothermal equation of state, while the background universe is essentially the Einstein/de Sitter one of standard cosmology, but with a small pressure. The model is found to be in overall good agreement with observation, and its adjustable parameters are assigned numerical values. The equation of state for a cluster and the finite cosmological pressure are properties of the model which can in principle be investigated by carrying out observations.
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