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Large scale calculations of core oscillations in globular clusters

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The Use of Supercomputers in Stellar Dynamics

Part of the book series: Lecture Notes in Physics ((LNP,volume 267))

Abstract

Fokker-Planck simulations of the evolution of globular clusters containing binaries produced by two-body tidal captures and three-body interactions have been separately carried out. In both cases, the expansion phase following the first core collapse is found to be unstable when the codes are run with small time steps (of order the central relaxation time tro). Large amplitude highly nonlinear oscillations develop in the core structure parameters such as central density. The instability observed for the case of three-body binaries is quite similar to that found by Bettwieser and Sugimoto in several studies based on the fluid dynamical model for star clusters. Goodman (1986) has shown for the case of three-body binaries that the instability is intrinsic to the model rather than numerical in origin. A large-scale study of core oscillations is planned using the Cray X-MP at the National Center for Supercomputing Applications.

This work was supported in part by the Sloan Foundation and by the National Science Foundation grant no. 8217352 and AST 83-41412.

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References

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Authors and Affiliations

  1. Indiana University, 47405, Bloomington, IN, USA

    H. Cohn, M. W. Wise & T. S. Yoon

  2. Princeton University Observatory, 08540, Princeton, NJ, USA

    T. S. Statler & J. P. Ostriker

  3. Institute for Advanced Study, 08540, Princeton, NJ, USA

    P. Hut

Authors
  1. H. Cohn
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  2. M. W. Wise
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  3. T. S. Yoon
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  4. T. S. Statler
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  5. J. P. Ostriker
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  6. P. Hut
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Editor information

Piet Hut Stephen L. W. McMillan

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© 1986 Springer-Verlag

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Cohn, H., Wise, M.W., Yoon, T.S., Statler, T.S., Ostriker, J.P., Hut, P. (1986). Large scale calculations of core oscillations in globular clusters. In: Hut, P., McMillan, S.L.W. (eds) The Use of Supercomputers in Stellar Dynamics. Lecture Notes in Physics, vol 267. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0116415

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  • DOI: https://doi.org/10.1007/BFb0116415

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-17196-6

  • Online ISBN: 978-3-540-47361-9

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