| Author(s): | Spurzem, R. |
| Title: | Direct N-body Simulations |
| Source: | In: Riffert H., Werner K. (eds), Computational Astrophysics, The Journal of Computational and Applied Mathematics (JCAM) 109, 407 - 432 |
| Year: | 1999 |
| Abstract: | Special high-accuracy direct force summation N-body algorithms and their relevance for the simulation of the dynamical evolution of star clusters and other gravitating N-body systems in astrophysics are presented, explained and compared with other methods. Other methods means here approximate physical models based on the Fokker-Planck equation as well as other, approximate algorithms to compute the gravitational potential in N-body systems. Questions regarding the parallel implementation of direct ``brute force'' N-body codes are discussed. The astrophysical application of the models to the theory of relaxing rotating and non-rotating collisional star clusters is presented, briefly mentioning the questions of the validity of the Fokker-Planck approximation, the existence of gravothermal oscillations and of rotation and primordial binaries. |
| Preprint issued: | |
| Remarks: | Preprint No. 96 |
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