Application of a massively parallel computer to the N-body problem |
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Authors: | Paul Hertz Stephen L. W. McMillan |
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Affiliation: | (1) Naval Research Laboratory, E. O. Hulburt Center for Space Research, 20375 Washington, DC, USA;(2) Department of Physics, Drexel University, 19104 Philadelphia, PA, USA |
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Abstract: | Parallel processor computers represent a new technology that has recently become available for astronomical applications. We have implemented an N-body code on a TMC Connection Machine CM-2 in order to investigate the advantages of a massively parallel computer over serial machines, including conventional supercomputers. For collisionless problems following N stars, a direct integration code scales as O(N2) on serial machines and on the CM-2 as O(log(N)) for small N and O(N log(N)) for large N. The CM-2 outperforms workstations for N>50 and supercomputers for N>4000. |
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