Astrophysics and Space Science

, Volume 107, Issue 2, pp 209–222 | Cite as

Interaction of the Large Magellanic Cloud with the halo population and the companions of the Galaxy

  • Mauri J. Valtonen
  • Kimmo A. Innanen
  • Leena Tähtinen


Numerical simulations have been performed in order to study the gravitational interaction between the outlying population of the Galaxy and the Large Magellanic Cloud (LMC). The following effects have been noted: (1) halo objects are partially removed from the orbital distance of the LMC such that a local minimum is created in the radial density profile; (2) a large number of halo objects go into escape orbits. This possibility makes the determination of the mass of the Galaxy by virial theorem arguments unreliable; (3) the orbit of the LMC decays faster than what one would expect on the basis of the classical dynamical friction calculation. The excess friction derives from three-body effects, which are not accounted for in the classical dynamical friction. Finally, the fates of globular clusters and dwarf galaxies near the Galaxy and the LMC are discussed.


Local Minimum Density Profile Globular Cluster Gravitational Interaction Dynamical Friction 
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  1. Anosova, Zh. P. and Polozhentsev, D. D.: 1978,Trudy Astron. Obs. Leningrad 34, 128.Google Scholar
  2. Cowley, A. P. and Hartwick, F. D. A.: 1981,Astron. J. 86, 667.Google Scholar
  3. de Vaucouleurs, G. and Pence, W. C.: 1978,Astron. J. 83, 1163.Google Scholar
  4. Hanes, D. and Madore, B. (eds.): 1980,Globular Clusters, Cambridge Univ. Press, Cambridge.Google Scholar
  5. Harris, W. E.: 1976,Astron. J. 81, 1095.Google Scholar
  6. Hartwick, F. D. A. and Sargent, W. L. W.: 1978,Astrophys. J. 221, 512.Google Scholar
  7. Hawkins, M. R. S.: 1983,Nature 303, 406.Google Scholar
  8. Hodge, P. W.: 1971,Ann. Rev. Astron. Astrophys. 9, 35.Google Scholar
  9. Innanen, K. A. and Valtonen, M. J.: 1977,Astrophys. J. 214, 692.Google Scholar
  10. Innanen, K. A., Harris, W. E., and Webbink, R. F.: 1982a,Astron. J. 88, 338.Google Scholar
  11. Innanen, K. A., Tähtinen, L., and Valtonen, M. J.: 1982b,Astron. J. 87, 1606.Google Scholar
  12. Lin, D. N. C. and Lynden-Bell, D.: 1982,Monthly Notices Roy. Astron. Soc. 198, 707.Google Scholar
  13. Miller, R. H. and Smith, B. F.: 1984, preprint.Google Scholar
  14. Tremaine, S. D.: 1976,Astrophys. J. 203, 72.Google Scholar
  15. Valtonen, M. J.: 1974, in Y. Kozai (ed.),The Stability of the Solar System and of Small Stellar Systems, D. Reidel Publ. Co., Dordrecht, Holland, p. 211.Google Scholar
  16. Valtonen, M. J., Innanen, K. A., and Tähtinen, L.: 1981,Turku University Observatory-Informo, No. 50.Google Scholar
  17. White, S. D.: 1983,Astrophys. J. 274, 53.Google Scholar

Copyright information

© D. Reidel Publishing Company 1984

Authors and Affiliations

  • Mauri J. Valtonen
    • 1
  • Kimmo A. Innanen
    • 1
    • 2
  • Leena Tähtinen
    • 1
  1. 1.Turku University ObservatoryUniversity of TurkuFinland
  2. 2.Physics Dept.York UniversityTorontoCanada

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