Statistics – Computation
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991comph...5..164b&link_type=abstract
Computers in Physics (ISSN 0894-1866), vol. 5, Mar.-Apr. 1991, p. 164-175, 178, 179.
Statistics
Computation
130
Computational Astrophysics, Computerized Simulation, Equations Of Motion, Hubble Constant, Many Body Problem, Boundary Conditions, Cosmology, Dark Matter, Galactic Structure, Halos, Imaging Techniques
Scientific paper
The physical and computational aspects of a number of large cosmological N-body simulations are discussed. Equations of motion and initial conditions are considered, noting that the initial positions and velocities of particles in a cosmological N-body simulation can be obtained from the density fluctuation field using a Langrangian description originated by Zel'dovich. Numerical methods for cosmological N-body simulations are discussed and it is noted that they have four desiderata: (1) accurate forces between particles; (2) accurate time integration; (3) large N; and (4) periodic boundary conditions. All of the simulations involving two million particles or more were run on an IBM 3090-600J supercomputer. The total memory requirement for a particle-mesh simulation of this size is nearly 950 MB. The method for obtaining this and the manner in which vector and parallel operations are conducted are discussed. Dynamic range and self-similar hierarchical clustering are considered and a case study of galaxy formation is presented.
Bertschinger Edmund
Gelb James M.
No associations
LandOfFree
Cosmological N-body simulations 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 Cosmological N-body simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmological N-body simulations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1790808