Hostname: page-component-cd9895bd7-jn8rn Total loading time: 0 Render date: 2024-12-25T16:28:40.706Z Has data issue: false hasContentIssue false
  • English
  • Français

Relaxation Times in Strictly Disk Systems

Published online by Cambridge University Press:  12 April 2016

George B. Rybicki
George B. Rybicki*
Affiliation:
Smithsonian Astrophysical Observatory, Cambridge, Mass. 02138, U.S.A.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

It is shown that the time of relaxation by particle encounters of self-gravitating systems in the plane interacting by 1/r2 forces is of the same order of magnitude as the mean orbit time. Therefore such a system does not have a Vlasov limit for large numbers of particles, unless appeal is made to some non-zero thickness of the disk. The relevance of this result to numerical experiments on galactic structure is discussed.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 10: Gravitational N-Body Problem , November 1971 , pp. 15 - 19
Copyright
Copyright © Reidel 1971

References

Chandrasekhar, S.: 1939, Principles of Stellar Dynamics, Dover Publ., New York.Google Scholar
Hénon, M.: 1958, Ann. Astrophys. 21, 186.Google Scholar
Hohl, F. and Hockney, R. W.: 1969, J. Comp.Phys. 4, 306.CrossRefGoogle Scholar
Hohl, F.: 1970, NASA TR R-343.Google Scholar
Miller, R. H. and Prendergast, K. H.: 1968, Astrophys. J. 151, 699.CrossRefGoogle Scholar
Miller, R. H., Prendergast, K. H., and Quirk, W. J.: 1969, Univ. of Chicago Rept. COO-614-72.Google Scholar
Ostriker, J. P. and Davidsen, A. F.: 1968, Astrophys. J. 151, 679.CrossRefGoogle Scholar
Toomre, A.: 1964, Astrophys. J. 139, 1217.CrossRefGoogle Scholar