http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Nonlinear approximation for perturbations in ΛCDM
Nonlinear approximation for perturbations in Lambda CDM
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 solutions (Lemaître-Tolman-Bondi metric with the inclusion of a cosmological constant) describing growing structure in a ΛCDM universe and find that the expansion approximates the exact solution well, following the collapse of an over-density all the way into a singularity.
Gerasimos Rigopoulos and Wessel Valkenburg
Physical review. D, Particles, fields, gravitation, and cosmology
[Erscheinungsort nicht ermittelbar] : Soc., 1970
86(2012,4) Artikel-Nummer 043523, 8 Seiten