Statistics – Computation
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994ap%26ss.216..353r&link_type=abstract
Astrophysics and Space Science, vol. 216, no. 1-2, p. 353-357
Statistics
Computation
1
Astronomical Models, Disk Galaxies, Galactic Halos, Gas Dynamics, Gravitational Effects, Gravitational Fields, Interstellar Gas, Many Body Problem, Stellar Gravitation, Systems Stability, Two Dimensional Models, Computational Grids, Computerized Simulation, Mathematical Models
Scientific paper
High-softening two-dimensional models, frequently employed in N-body experiments, do not provide faithful simulations of real galactic discs. A prescription (spades) is given for choosing meaningful values of the softening length. In addition, a local stability criterion (clubs) is given for choosing meaningful input values of the Toomre parameter for a given softening length. Such a criterion should also provide a key to a correct interpretation of computational results in terms of real phenomena.
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