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- W4306246430 endingPage "583" @default.
- W4306246430 startingPage "583" @default.
- W4306246430 abstract "The Newtonian Lagrangian perturbation theory is a widely used framework to study structure formation in cosmology in the nonlinear regime. We review a general-relativistic formulation of such a perturbation approach, emphasizing results on an already developed extensive formalism including among other aspects: the non-perturbative modeling of Ricci and Weyl curvatures, gravitational waves, and pressure-supported fluids. We discuss subcases of exact solutions related to Szekeres Class II and, as an exact average model, Ricci-flat LTB models. The latter forms the basis of a generalization that we then propose in terms of a scheme that goes beyond the relativistic Lagrangian perturbation theory on a global homogeneous-isotropic background cosmology. This new approximation does not involve a homogeneous reference background and it contains Szekeres class I (and thus general LTB models) as exact subcases. Most importantly, this new approximation allows for the interaction of structure with an evolving “background cosmology”, conceived as a spatial average model, and thus includes cosmological backreaction." @default.
- W4306246430 created "2022-10-15" @default.
- W4306246430 creator A5013189900 @default.
- W4306246430 creator A5043144326 @default.
- W4306246430 creator A5070294552 @default.
- W4306246430 date "2022-11-04" @default.
- W4306246430 modified "2023-10-10" @default.
- W4306246430 title "On General-Relativistic Lagrangian Perturbation Theory and Its Non-Perturbative Generalization" @default.
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