4 papers · 1 filter
Optimizing Higher-order Lagrangian Perturbation Theory for Cold Dark Matter Models
A. G. Weiss, S. Gottloeber, T. Buchert
We report on the performance of Lagrangian perturbation theory up to the second order for the standard cold dark matter (SCDM) and broken scale invariance (BSI) scenarios. We norma…
Optimized Lagrangian Approximations for Modelling Large--Scale Structure at Non--Linear Stages
T. Buchert, A. L. Melott, A. G. Weiss
Approximations to the exact solutions for gravitational instability in the expanding Universe are extremely useful for understanding the evolution of large--scale structure. We rep…
Optimized Lagrangian Approximations for Modelling Large--Scale Structure at Non--Linear Stages
T. Buchert, A. L. Melott, A. G. Weiss
We report on a series of tests of Newtonian Lagrangian perturbation schemes using N--body simulations for various power--spectra with scale--independent indices in the range t…
Testing Higher-Order Lagrangian Perturbation Theory Against Numerical Simulations - 1. Pancake Models
T. Buchert, A. L. Melott, A. G. Weiss
We present results showing an improvement of the accuracy of perturbation theory as applied to cosmological structure formation for a useful range of quasilinear scales. The Lagran…