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Nonlinear Cosmological Structure Formation a a
Author(s) -
MA CHUNGPEI
Publication year - 1998
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1111/j.1749-6632.1998.tb08959.x
Subject(s) - nonlinear system , cold dark matter , physics , spectral density , matter power spectrum , structure formation , dark matter , dark energy , cosmological model , gravitation , spectrum (functional analysis) , astrophysics , power (physics) , cosmology , linear model , statistical physics , theoretical physics , classical mechanics , quantum mechanics , mathematics , statistics , galaxy
A bstract : A general discussion of the evolution and model‐dependence of both the linear and nonlinear power spectrum of density fluctuations is presented. The features of the linear power spectrum in cosmological models with cold dark matter (CDM) and cold + hot dark matter (C + HDM) are reviewed, and useful analytical approximations are summarized. Cosmological numerical simulation results are then used to illustrate the process of nonlinear gravitational clustering and to compute the nonlinear power spectrum. A new analytical approximation relating the linear and nonlinear power spectrum in C + HDM models is presented.