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| Paper: |
Supermassive Black Hole Binaries in High Performance Massively Parallel Direct N-body Simulations on Large GPU Clusters |
| Volume: |
453, Advances in Computational Astrophysics: Methods, Tools, and Outcome |
| Page: |
223 |
| Authors: |
Spurzem, R.; Berczik, P.; Zhong, S.; Nitadori, K.; Hamada, T.; Berentzen, I.; Veles, A. |
| Abstract: |
Astrophysical Computer Simulations of Dense Star Clusters in Galactic Nuclei with Supermassive
Black Holes are presented using new cost-efficient supercomputers in China accelerated by
graphical processing cards (GPU).
We use large high-accuracy direct N-body simulations with Hermite scheme and block-time steps,
parallelised across a large number of nodes on the large scale and across many GPU thread
processors on each node on the small scale.
A sustained performance of more than 350 Tflop/s for a science run
on using simultaneously 1600 Fermi C2050 GPUs is reached; a detailed performance model is presented and studies
for the largest GPU clusters in China with up to Petaflop/s performance and 7000 Fermi GPU cards.
In our case study we look at two supermassive black holes with equal and unequal masses
embedded in a dense stellar cluster in a galactic nucleus. The hardening processes
due to interactions between black holes and stars, effects of rotation in the stellar
system and relativistic forces between the black holes are simultaneously taken into
account. The simulation stops at the complete relativistic merger of the black holes. |
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