Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2012-02-21
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
8 pages, 9 figures, accepted MNRAS, small typo corrected
Scientific paper
We report on results of fully consistent N-body simulations of globular cluster models with N = 100 000 members containing neutron stars and black holes. Using the improved `algorithmic regularization' method of Hellstrom and Mikkola for compact subsystems, the new code NBODY7 enables for the first time general relativistic coalescence to be achieved for post-Newtonian terms and realistic parameters. Following an early stage of mass segregation, a few black holes form a small dense core which usually leads to the formation of one dominant binary. The subsequent evolution by dynamical shrinkage involves the competing processes of ejection and mergers by radiation energy loss. Unless the binary is ejected, long-lived triple systems often exhibit Kozai cycles with extremely high inner eccentricity (e > 0.999) which may terminate in coalescence at a few Schwarzschild radii. A characteristic feature is that ordinary stars as well as black holes and even BH binaries are ejected with high velocities. On the basis of the models studied so far, the results suggest a limited growth of a few remaining stellar mass black holes in globular clusters.
No associations
LandOfFree
Mergers and ejections of black holes in globular clusters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Mergers and ejections of black holes in globular clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mergers and ejections of black holes in globular clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-423841