Average density in cosmology

Details Average density in cosmology Average density in cosmology

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...316...49b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 316, May 1, 1987, p. 49-51.

Mathematics

Logic

16

Astronomical Models, Cosmology, Density Distribution, Space Density, Galactic Clusters, Schwarzschild Metric

Scientific paper

The Einstein-Straus (1945) vacuole is here used to represent a bound cluster of galaxies embedded in a standard pressure-free cosmological model, and the average density of the cluster is compared with the density of the surrounding cosmic fluid. The two are nearly but not quite equal, and the more condensed the cluster, the greater the difference. A theoretical consequence of the discrepancy between the two densities is discussed.

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