Long-term stability of collisionless equilibrium configurations; algorithms
| dc.creator | Gauthier, Jean-Rene | |
| dc.creator | Martel, Hugo | |
| dc.date | 2005-01-28 | |
| dc.date.accessioned | 2026-07-07T02:16:53Z | |
| dc.date.available | 2026-07-07T02:16:53Z | |
| dc.description | We present the summary of the theoretical aspects and algorithms used in an undergraduate (JRG) summer project based on numerical N-body simulations of collisionless systems. First, we review the importance of numerical N-body simulations in astrophysics. We introduce the different codes used and their performances. We then introduce four famous density profiles : Hernquist, NFW, truncated isothermal sphere, and Plummer. The history of these profiles and their dynamical properties are discussed in the third section. In the fourth section, we present the Barnes & Hut tree code, its features and performances. We then explain how to build and incorporate a multiple time stepping scheme in a tree code. The fifth section is dedicated to the different physical measurements we used to characterize the dynamics of the N-body system. Finally, we describe the future work that will be done with these codes, mainly the study of the adiabatic growth of a black hole at the center of a spherical distribution of stars. | |
| dc.description | 18 pages, 6 figures (3 in color). Technical report | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0501642 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0501642 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/8964 | |
| dc.subject | Astrophysics | |
| dc.title | Long-term stability of collisionless equilibrium configurations; algorithms | |
| dc.type | text |