1996/07/02 by F. Bernardeau, Bernardeau, F.
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9607004
11 pages; To appear in the proceedings of the XXXIth Moriond meeting, "Dark matter in Cosmology, Quantum Measurements, Experimental Gravitation", Les Arcs, France, Jan 20-27, 1996
arxiv created 1996/07/02 · arxiv updated 2009/12/01
The understanding of the large-scale structure formation requires the resolution of coupled nonlinear equations describing the cosmic density and velocity fields. This is a complicated problem that, for the last decade, has been essentially addressed with N-body simulations. There is however a regime, the so-called quasi-linear regime, for which the relative density fluctuations are on average below unity. It is then possible to apply Perturbation Theory techniques where the perturbation expansions are made with respect to the initial fluctuations. I review here the major results that have been obtained in this regime.