Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-09-21
Astronomy and Astrophysics
Astrophysics
Final version accepted for ApJ Letters. Minor revisions, including due to bug fix in tree code. Uses aasms4.sty. 15 pages. Hig
Scientific paper
10.1086/310590
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 collective field should determine evolution: Two-body scattering in simulations violates the Poisson-Vlasov equations. We test this in PM, P$^3$M, Tree, and NGPM codes, noting that a collisionless code will preserve the one-dimensional character of plane wave collapse. We find collisionality vanishing as the softening parameter approaches the mean interparticle separation. Solutions for the problem are suggested, involving greater computer power, PM-based nested grid codes, and a more conservative approach to resolution claims.
Melott Adrian L.
Shandarin Sergei F.
Splinter Randall J.
Suto Yasushi
No associations
LandOfFree
Demonstrating Discreteness and Collision Error in Cosmological N-body Simulations of Dark Matter Gravitational Clustering does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Demonstrating Discreteness and Collision Error in Cosmological N-body Simulations of Dark Matter Gravitational Clustering, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Demonstrating Discreteness and Collision Error in Cosmological N-body Simulations of Dark Matter Gravitational Clustering will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-108824