2001/05/31 by James Binney, Alexander Knebe · 3 citations
Physics and Astronomy · #Astrophysics and Star Formation Studies #Cosmology and Gravitation Theories #Galaxies: Formation, Evolution, Phenomena #astro-ph
paper · pdf · doi:10.1046/j.1365-8711.2002.05400.x
published as Mon.Not.Roy.Astron.Soc. 333 (2002) 378 · 5 pages, 4 figures, replaced with substanially revised version (much cleaner initial conditions used, but results remain unchanged), MNRAS in press
arxiv created 2002/02/07 · openalex publication_date 2002/06/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
It is logically possible that early two-body relaxation in simulations of cosmological clustering influences the final structure of massive clusters. Convergence studies in which mass and spatial resolution are simultaneously increased cannot eliminate this possibility. We test the importance of two-body relaxation in cosmological simulations with simulations in which there are two species of particles. The cases of two mass ratios, p 2:1 and 4:1, are investigated. Simulations are run with both a spatially fixed softening length and adaptive softening using the publicly available codes GADGET and MLAPM, respectively.