N-body codes for simulating galactic structure

N-body codes simply push N-particles according to a two-body force equation. In galactic structure calculations, the gravitational force between two particles is given by

References:

1. E. Griv, T. Chiueh, and W. Peter, "The weakly nonlinear theory of density waves in a stellar disk," Physica A 205, 299 (1994).
2. E. Griv, T. Chiueh, and W. Peter, "Stability of a stellar disk of flattened galaxies: I. A collisionless system," submitted to The Astrophysical Journal.
3. E. Griv, T. Chiueh, and W. Peter, "Stability of a stellar disk of flattened galaxies: II. The effect of collisions," submitted to The Astrophysical Journal.