Quasi-nonlinear theory of cosmological self-gravitating systems

Details Quasi-nonlinear theory of cosmological self-gravitating systems Quasi-nonlinear theory of cosmological self-gravitating systems

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9119989s&link_type=abstract

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Physics

Cosmology, Gravitational Fields, Nonlinear Systems, Nonlinearity, Perturbation Theory, Universe, Galactic Evolution, Shapes, Spectrum Analysis

Scientific paper

Nonlinear effects of self-gravitating systems in cosmology are considered on the basis of perturbation theory. In particular, several cases are examined in which evolution of power-spectrum of density fluctuations can be analytically calculated. In some cases, nonlinearity suppresses the growth of fluctuations relative to linear theory, and the power transfer via nonlinear mode-coupling is sensitive to the specific shape of the underlying fluctuation spectrum. The result is in good agreement with recent numerical simulations.

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