Density constraints on local inhomogeneity in cosmology

Details Density constraints on local inhomogeneity in cosmology Density constraints on local inhomogeneity in cosmology

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...337..601e&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 337, Feb. 15, 1989, p. 601, 602.

Statistics

Computation

2

Cosmology, Galactic Clusters, Computational Astrophysics, Inhomogeneity, Space Density

Scientific paper

Bonnor (1987) used the model proposed by Einstein and Strauss (1945, 1946) to represent a cluster of galaxies immersed in the standard cosmological model with vanishing pressure. Bonnor's result implied a model where the local average energy density would not be the same as that of the global average density of the universe. Problems raised by this result are analyzed, and it is demonstrated that the mean density of a local spherical inhomogeneity on a Robertson-Walker universe has to be equal to the cosmological energy density.

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