The dominant local instabilities in an Einstein-de Sitter universe

Details The dominant local instabilities in an Einstein-de Sitter universe The dominant local instabilities in an Einstein-de Sitter universe

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...361..331b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 361, Oct. 1, 1990, p. 331-337. Research supported by Ohio State University

Astronomy and Astrophysics

Astrophysics

19

Dark Matter, Galactic Clusters, Many Body Problem, Perturbation Theory, Equations Of Motion, Green'S Functions, Legendre Functions, Poisson Equation

Scientific paper

The evolution of compensated aspherical perturbations in an Einstein-de Sitter universe with cold collisionless matter is investigated using both N-body simulations and quasi-analytic similarity solutions to treat the evolution of compensated axisymmetric structures. The solutions consist of a central void surrounded by an inhomogeneous shell. It is assumed that the structures are much smaller than the horizon scale so that Newtonian gravity is a good approximation. The results obtained from the two approaches are compared, and the implications are discussed.

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