On the use of a heterogeneous MIMD-SIMD platform to simulate the dynamics of globular clusters with a central massive object

R.Capuzzo Dolcetta, N. Pucello, V. Rosato, F. Saraceni

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Abstract

The dynamics of a large stellar (globular) cluster containing N= 128,000 stars has been simulated using a direct summation (O(N2)) method and a heterogeneous platform. Preliminary simulations have been carried out on model systems with and without the presence, in their center of mass, of a black hole whose mass has been varied from 0.02 to 0.1 times the total mass of the cluster. These simulations followed the evolution of the globular cluster in order to describe its dynamics over an interval of time sufficiently large with respect to the internal crossing time. Computations have demonstrated that the platform heterogeneity, allowing a very efficient use of the computational resources, can be considered a key feature for sustaining large computational loads. Our results show that the massive object in the center of the cluster alters the surrounding star distribution very quickly; the following evolution is much slower, as it occurs via two-body collisional relaxation. © 2001 Elsevier Science.
Original languageEnglish
Pages (from-to)208 - 225
Number of pages18
JournalJournal of Computational Physics
Volume174
Issue number1
DOIs
Publication statusPublished - 20 Nov 2001
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • Computer Science Applications

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