Numerical study of a perturbed Einstein-de Sitter cosmological model

Details Numerical study of a perturbed Einstein-de Sitter cosmological model Numerical study of a perturbed Einstein-de Sitter cosmological model

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...368..337f&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 368, Feb. 20, 1991, p. 337-340. Research supported by CAPES.

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Astronomical Models, Cosmology, Einstein Equations, Galactic Clusters, Computational Astrophysics, Perturbation Theory, Red Shift

Scientific paper

Given the ever-increasing scale of structures discovered in the universe, Einstein's equations are solved numerically, under simplifying assumptions, to examine how this lack of uniformity affects the metric of Einstein-de Sitter cosmology. The results confirm the qualitative conclusion of Barrow, that a large density contrast is compatible with much smaller metric perturbations. The contribution of this peculiar gravity to the redshift might complicate studies of peculiar motions of galaxies, although it appears that the distortion is small for nearby clusters.

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