Nonlinear approximation for perturbations in ΛCDM

We describe inhomogeneities in a ΛCDM universe with a gradient series expansion and show that it describes the gravitational evolution far into the nonlinear regime and beyond the capacity of standard perturbation theory at any order. We compare the gradient expansion with exact inhomogeneous ΛLTB s...

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Bibliographic Details
Main Authors: Rigopoulos, Gerasimos (Author) , Valkenburg, Wessel (Author)
Format: Article (Journal)
Language:English
Published: 2012
In: Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2012, Volume: 86, Issue: 4
ISSN:1550-2368
DOI:10.1103/PhysRevD.86.043523
Online Access:Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.86.043523
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.86.043523
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Author Notes:Gerasimos Rigopoulos and Wessel Valkenburg

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