Changbom Park

TL;DR: In this paper, the authors employed a matrix-based power spectrum estimation method using pseudo-Karhunen-Loeve eigenmodes, producing uncorrelated minimum-variance measurements in 20 k-bands of both the clustering power and its anisotropy due to redshift-space distortions.

TL;DR: A parallel, cosmological N-body code based on a hybrid scheme using the particle-mesh (PM) and Barnes-Hut (BH) oct-tree algorithm that scales well to 128 processors and is significantly better than competing methods.

TL;DR: The power spectrum of the galaxy distribution in the Center for Astrophysics Redshift Survey (de Lapparent et al., 1986; Geller and Huchra, 1989; and Huygulu et al. as mentioned in this paper ) is measured up to wavelengths of 200/h Mpc.

TL;DR: In the nonlinear regime, the void probability function (VPF) as discussed by the authors exhibits apparent agreement with hierarchical scaling (such scaling implies that the N-point correlation functions for N greater than 2 depend only on pairwise products of the two-point function xi(r)) However, simulations of cosmological models show that this scaling in redshift space does not necessarily imply such scaling in real space.

TL;DR: In this article, a series of 3D cosmological N-body simulations were used to explore nonlinear gravitational instability using two numerical experiments, each of which employs three different values of critical wavenumbers to see how the progressive elimination or substitution of initial high-frequency components affects the final, nonlinear structure.