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Asymptotic behaviour of a stratified perturbation in a three dimensional expanding universe
RISE, Swedish ICT, SICS.
2002 (English)In: Astronomy and Astrophysics, ISSN 0004-6361, E-ISSN 1432-0746, Vol. 395, p. 399-408Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2002, 1. Vol. 395, p. 399-408
National Category
Computer and Information Sciences
Identifiers
URN: urn:nbn:se:ri:diva-22493DOI: 10.1051/0004-6361:20021197OAI: oai:DiVA.org:ri-22493DiVA: diva2:1042058
Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2018-01-14Bibliographically approved

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CiteExportLink to record
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