131 citations · 386 across the 6 of their papers we have counts for
6 papers
The Tree-Particle-Mesh N-body Gravity Solver
Paul Bode, Jeremiah P. Ostriker, Guohong Xu
The Tree-Particle-Mesh (TPM) N-body algorithm couples the tree algorithm for directly computing forces on particles in an hierarchical grouping scheme with the extremely efficient…
An Automated Cluster Finder: the Adaptive Matched Filter
Jeremy Kepner, Xiaohui Fan, Neta Bahcall +3
We describe an automated method for detecting clusters of galaxies in imaging and redshift galaxy surveys. The Adaptive Matched Filter (AMF) method utilizes galaxy positions, magni…
Hydrodynamic and N-body Schemes On An Unstructured, Adaptive Mesh with Applications to Cosmological Simulations
Guohong Xu
The theory and application of numerical methods for unstructured meshes have been improved significantly in recent years. Because the grids can be place arbitrarily in space, unstr…
Sensitivity of Galaxy Cluster Morphologies to Omega_0 and P(k)
David A. Buote, Guohong Xu
We examine the sensitivity of the spatial morphologies of galaxy clusters to Omega_0 and P(k) using high-resolution N-body simulations with large dynamic range. Variants of the sta…
Effects of Weak Gravitational Lensing from Large-Scale Structure on the Determination of
Joachim Wambsganss, Renyue Cen, Guohong Xu +1
Weak gravitational lensing by large-scale structure affects the determination of the cosmological deceleration parameter . We find that the lensing induced dispersions on trul…
A New Parallel N-body Gravity Solver: TPM
Guohong Xu
We have developed a gravity solver based on combining the well developed Particle-Mesh (PM) method and TREE methods. It is designed for and has been implemented on parallel compute…