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Asymptotic behaviour of a stratified perturbation in a three dimensional expanding universe

Fanelli, Duccio and Aurell, Erik (2002) Asymptotic behaviour of a stratified perturbation in a three dimensional expanding universe. Astronomy & Astrophysics, 395 . pp. 399-408.

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Official URL: http://xxx.lanl.gov/abs/astro-ph/0203435

Abstract

The non-linear evolution of a stratified perturbation in a three dimensional expanding Universe is considered. A general Lagrangian scheme (Q model) is introduced and numerical investigations are performed. The asymptotic contraction of the core of the agglomeration is studied. A power-law scaling is detected and an heuristic interpretation of the numerical findings is provided. An asymptotic equation for the multi-stream velocity flow is derived and it is shown to agree quantitatively with the dynamics of the Q model. The relation to the adhesion model is discussed.

Item Type:Article
ID Code:2915
Deposited By:INVALID USER
Deposited On:11 Jul 2008
Last Modified:18 Nov 2009 16:16

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