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07 February 2025
 
  » arxiv » astro-ph/0412025

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Lagrangian perturbation theory in Newtonian cosmology
Takayuki Tatekawa ;
Date 1 Dec 2004
Subject astro-ph gr-qc
AbstractWe discuss various analytical approximation methods for the evolution of the density fluctuation in the Universe. From primordial density fluctuation, the large-scale structure is formed via its own self-gravitational instability. For this dynamical evolution, several approaches have been considered. In Newtonian cosmology, in which matter motion is described by Newtonian dynamics with cosmic expansion, Lagrangian description for the cosmic fluid is known to work rather well for quasi-nonlinear clustering regime. In this paper, we briefly review Lagrangian perturbation theory in Newtonian cosmology.
Source arXiv, astro-ph/0412025
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