Direct N-body calculations.
Abstract
The main principles for direct integration of large point-mass systems are outlined. Most particles are advanced by the Ahmad-Cohen neighbour scheme, using fourth-order force polynomials and individual time-steps. Close encounters and persistent binaries are handled by two-body regularization, whereas extreme triple and quadruple configurations are treated as unperturbed systems by special regularization techniques. As an illustration, some recent results of an isolated system containing 1000 particles of unequal mass are discussed, with special emphasis on the post-collapse phase.
- Publication:
-
Dynamics of Star Clusters
- Pub Date:
- 1985
- Bibcode:
- 1985IAUS..113..251A
- Keywords:
-
- Computational Astrophysics;
- Many Body Problem;
- Mass Distribution;
- Star Clusters;
- Star Distribution;
- Stellar Evolution;
- Binary Stars;
- Four Body Problem;
- Gravitational Collapse;
- Three Body Problem;
- Two Body Problem;
- Astrophysics;
- N-Body Problem:Stellar Dynamics;
- Stellar Dynamics:N-Body Problem