Second-order Lagrangian perturbation theory initial conditions for resimulations
Second-order Lagrangian perturbation theory initial conditions for resimulations
We describe and test a new method for creating initial conditions for cosmological N-body dark matter simulations based on second-order Lagrangian perturbation theory (2lpt). The method can be applied to multimass particle distributions making it suitable for creating resimulation, or ‘zoom’ initial conditions. By testing against an analytic solution, we …