Second-order evolution of cold dark matter perturbations

Details Second-order evolution of cold dark matter perturbations Second-order evolution of cold dark matter perturbations

Mar 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.243..171c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 243, March 1, 1990, p. 171-176.

Astronomy and Astrophysics

Astronomy

26

Dark Matter, Evolution (Development), Gravitational Effects, Mass Distribution, Perturbation Theory, Correlation, Many Body Problem, Power Spectra, Red Shift

Scientific paper

Second-order perturbation theory is used to study the nonlinear gravitational evolution of the mass distribution on scales of several tens of Mpc in the standard CDM cosmogony. The results show that nonlinear evolution can move the first zero-crossing of the matter correlation function outwards if a high normalization is used, but that the change is very small with a more standard 'biased' CDM normalization. If rich clusters occur at the peaks of the primordial perturbation field, then these nonlinear dynamical effects are still negligible compared to the statistical clustering and the increase in zero-crossing scale of Xi(CDM) cannot be expected to alleviate the large-scale structure problem for CDM to any appreciable extent.

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