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11 papers · 2 filters
Probing Large Scale Structure using Percolation and Genus Curves
Varun Sahni, B. S. Sathyaprakash, S. F. Shandarin
We study topological properties of large scale structure in a set of scale free N-body simulations using the genus and percolation curves as topological characteristics. Our result…
Testing Tree-Level Perturbation Theory for Large-Scale Structure with the Local Lagrangian Approximation
Zacharias A. M. Protogeros, Adrian L. Melott, Robert J. Scherrer
We test tree-level perturbation theory for Gaussian initial conditions with power spectra by comparing the probability distribution function (PDF) for the density…
Demonstrating Discreteness and Collision Error in Cosmological N-body Simulations of Dark Matter Gravitational Clustering
A. L. Melott, S. F. Shandarin, R. J. Splinter +1
Two-body scattering and other discreteness effects are unimportant in cosmological gravitational clustering in most scenarios, since the dark matter has a small particle mass. The…
The Bull's-Eye Effect: Are Galaxy Walls Observationally Enhanced?
Elizabeth. A. Praton, Adrian L. Melott, Margaret Q. McKee
We investigate a distortion in redshift-space which causes galaxies to appear to lie in walls concentric about the observer, forming a rough bull's-eye pattern. We simulate what an…
A Test of the Particle Paradigm in N-Body Simulations
B. Kuhlman, A. L. Melott, S. F. Shandarin
We present results of tests of the evolution of small ``fluid elements'' in cosmological N--body simulations, to examine the validity of their treatment as particles. We find that…
The Ellipticity and Orientation of Clusters of Galaxies from N-Body Experiments
Randall J. Splinter, Adrian L. Melott, Angela Linn +2
In this study we use simulations of 128 particles to study the ellipticity and orientation of clusters of galaxies in N-body simulations of differing power-law initial spectra…