How faithful are N-body simulations of disc galaxies? Artificial suppression of dynamical instabilities.

Details How faithful are N-body simulations of disc galaxies? Artificial suppression of dynamical instabilities. How faithful are N-body simulations of disc galaxies? Artificial suppression of dynamical instabilities.

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26at....7..317r&link_type=abstract

Astronomy and Astrophysics Trans., Vol. 7, No. 4, p. 317 - 321

Astronomy and Astrophysics

Astrophysics

N-Body Simulations: Instabilities, N-Body Simulations: Disk Galaxies, N-Body Simulations: Stellar Dynamics

Scientific paper

High-softening two-dimensional models, frequently employed in N-body experiments, do not provide faithful simulations of real galactic discs. A prescription is given for choosing meaningful values of the softening length. In addition, a local stability criterion 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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