A Hybrid N-Body Code Incorporating Algorithmic Regularization and Post-Newtonian Forces
arXiv:0803.2310 · doi:10.1111/j.1365-2966.2008.13557.x
Abstract
We describe a novel N-body code designed for simulations of the central regions of galaxies containing massive black holes. The code incorporates Mikkola's 'algorithmic' chain regularization scheme including post-Newtonian terms up to PN2.5 order. Stars moving beyond the chain are advanced using a fourth-order integrator with forces computed on a GRAPE board. Performance tests confirm that the hybrid code achieves better energy conservation, in less elapsed time, than the standard scheme and that it reproduces the orbits of stars tightly bound to the black hole with high precision. The hybrid code is applied to two sample problems: the effect of finite-N gravitational fluctuations on the orbits of the S-stars; and inspiral of an intermediate-mass black hole into the galactic center.
12 pages, 15 figures, accepted for publication in MNRAS
References in corpus (8)
- Testing the general relativistic ''no-hair'' theorems using the galactic center black hole SgrA*
- The structure of the nuclear stellar cluster of the Milky Way
- Ejection of Supermassive Black Holes from Galaxy Cores
- Implementing Few-Body Algorithmic Regularization with Post-Newtonian Terms
- Long-Term Evolution of Massive Black Hole Binaries. III. Binary Evolution in Collisional Nuclei
- Tracing intermediate-mass black holes in the Galactic Centre
- Resonant relaxation near a massive black hole: the dependence on eccentricity
- Post-Newtonian N-body simulations