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Star Cluster Simulations on HARP

Published online by Cambridge University Press:  25 May 2016

Sverre J. Aarseth
Sverre J. Aarseth*
Affiliation:
Institute of Astronomy, University of Cambridge, UK

Abstract

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We describe some aspects of implementing star cluster simulations on HARP. The code NBODY4 employs the Hermite scheme with hierarchical block-steps for direct integration. The algorithms have been optimized for parallel processing with the eight pipeline HARP-2 delivering a peak performance of about 1.7 Gflops for N = 104 particles. Hard binaries are studied by KS regularization which also uses the Hermite scheme, whereas strong interactions between 3–5 particles are treated by chain regularization. Astrophysical processes modelled include mass loss by stellar evolution, two-body tidal interaction, Roche lobe mass transfer, common envelope evolution, magnetic braking and gravitational radiation. Consistent values of stellar radii and evolution type are obtained by fast look-up. A new formulation of collision outcomes yields blue stragglers and other exotic objects. Some recent results for an open cluster model are presented.

Type
Large N-body Simulation
Information
Symposium - International Astronomical Union , Volume 174: Dynamical Evolution of Stars Clusters , 1996 , pp. 161 - 170
Copyright
Copyright © Kluwer 1996 

References

Aarseth, S.J. 1985, in Multiple Time Scales, ed. Brackbill, J.U. and Cohen, B.I. (Academic Press, New York), 377 Google Scholar
Aarseth, S.J. 1992, in Binaries as Tracers of Stellar Formation, ed. Duquennoy, A. and Mayor, M. (Cambridge University Press), 6 Google Scholar
Aarseth, S.J. 1994, in Galactic Dynamics and N-Body Simulations, ed. Contopoulos, G., Spyrou, N.K. and Vlahos, L. (Springer-Verlag), 277 Google Scholar
Aarseth, S.J. 1996, in Binaries in Clusters, ed. Milone, E.F. (ASP series), in press Google Scholar
Duquennoy, A. and Mayor, M. 1991, Astron. Astrophys. 248, 485 Google Scholar
Eggleton, P.P. and Kiseleva, L.G. 1995, Astrophys. J. in press Google Scholar
Eggleton, P.P., Fitchett, M.J., and Tout, C.A. 1989, Astrophys. J. 347, 998 CrossRefGoogle Scholar
Heggie, D.C. and Aarseth, S.J. 1992, Mon. Not. R. astr. Soc. 257, 513 Google Scholar
Heggie, D.C. and Ramamani, N. 1992, Mon. Not. R. astr. Soc. 272, 317 CrossRefGoogle Scholar
Kroupa, P. 1995, Mon. Not. R. astr. Soc. in press Google Scholar
Kroupa, P., Tout, C.A. and Gilmore, G. 1993, Mon. Not. R. astr. Soc. 262, 545 Google Scholar
Kustaanheimo, P. and Stiefel, E. 1965, J. Reine Angew. Math. 218, 204 Google Scholar
Lyne, A.G. and Lorimer, D.R. 1994, Nature, 369, 127 Google Scholar
Makino, J. 1991, Astrophys. J. 369, 200 CrossRefGoogle Scholar
Mardling, R.A. 1995, Astrophys. J. 450, 722 Google Scholar
Mardling, R.A. 1996, in preparation Google Scholar
Mardling, R.A. and Aarseth, S.J. 1996, in preparation Google Scholar
McMillan, S.L.W., Hut, P. and Makino, J. 1990, Astrophys. J. 362, 522 Google Scholar
McMillan, S.L.W., Hut, P. and Makino, J. 1991, Astrophys. J. 372, 111 CrossRefGoogle Scholar
Mikkola, S. and Aarseth, S.J. 1993, Celest. Mech. Dyn. Astron. 57, 439 Google Scholar
Mikkola, S. and Aarseth, S.J. 1996, to be published Google Scholar
Regös, E. and Tout, C.A. 1995, Mon. Not. R. astr. Soc. in press Google Scholar
Spurzem, R. and Aarseth, S.J. 1996, to be published Google Scholar
Tout, C.A. 1990, , Google Scholar
Tout, C.A. 1995, personal communication Google Scholar