Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...117..365o&link_type=abstract
Astronomy and Astrophysics, vol. 117, no. 2, Jan. 1983, p. 365-367.
Astronomy and Astrophysics
Astrophysics
20
Astronomical Models, Cosmology, Galactic Clusters, Galactic Evolution, Hubble Constant, Space Density, Conservation Laws, Mass Distribution, Perturbation Theory, Relativistic Theory, Symmetry, Universe, Vacuum
Scientific paper
The fact that the three-dimensional structure of the Universe consists of holes surrounded by matter is explained in terms of hyperbolic energy inhomogeneities. No mass condensation arises and the hole results from the overall mass expulsion from the assumed center of spherical symmetry. Mass conservation leads to the formation of a higher density spherical shell at the boundary of the hole. A matter ridge forms around each hole and expands faster than the Hubble flow; the collision of two such ridges may lead to the formation of a Zel'dovich pancake. The simplifying assumptions of spherical symmetry and of an Einstein-de Sitter background are used in the analysis, which can easily be extended to a more general background. In the model, the depth and width of a hole as well as the shape of the ridge around it are shown to depend in a simple way on the parameters; this may be used to infer the nature of the initial perturbations.
Occhionero Franco
Santangelo P.
Vittorio Nicola
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