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Wakes in Dark Matter Halos

  • Burkhard Fuchs
Conference paper

Summary

I discuss the dynamical interaction of galactic disks with the surrounding dark matter halos. In particular it is demonstrated that if the self-gravitating shearing sheet, a model of a patch of a galactic disk, is embedded in a live dark halo, this has a strong effect on the dynamics of density waves in the sheet. I describe how the density waves and the halo interact via halo particles either on orbits in resonance with the wave or on non-resonant orbits. Contrary to expectation the presence of the halo leads to a very considerable enhancement of the amplitudes of the density waves in the shearing sheet. This effect appears to be the equivalent of the recently reported enhanced growth of bars in numerically simulated stellar disks embedded in live dark halos. Finally I discuss the counterparts of the perturbations of the disk in the dark halo.

Keywords

Dark Matter Boltzmann Equation Density Wave Galactic Disk Stellar Disk 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    E. Athanassoula: Astroph. J., 569, L83 (2002)CrossRefADSGoogle Scholar
  2. 2.
    E. Athanassoula: Mon. Not. R. Astron. Soc., 341, 1179 (2003)CrossRefADSGoogle Scholar
  3. 3.
    V.P. Debattista, J. A. Sellwood: Astroph. J., 543, 704 (2000)CrossRefADSGoogle Scholar
  4. 4.
    W. Dehnen: Astron. J., 119, 800 (2000)CrossRefADSGoogle Scholar
  5. 5.
    B. Fuchs: Recurrent swing amplification induced by nonlinear amplitude effects. In: Dynamics of disc galaxies ed by B. Sundelius (Göteborgs Univ. and Chalmers Univ. of Tech., Göteborg 1991) pp 359–363Google Scholar
  6. 6.
    B. Fuchs: Astron. Astroph., 368, 107 (2001)MATHCrossRefADSGoogle Scholar
  7. 7.
    B. Fuchs: Astron. Astroph., 419, 941 (2004a)CrossRefADSGoogle Scholar
  8. 8.
    B. Fuchs: Astron. Astroph., submitted (2004b)Google Scholar
  9. 9.
    P. Goldreich, D. Lynden-Bell: Mon. Not. R. Astron. Soc., 130, 125 (1965)ADSGoogle Scholar
  10. 10.
    Gradshteyn, I.S., Ryzhik, I.M.: Table of Integrals, Series, and Products, 6th edn (Academic Press, New York 2000)MATHGoogle Scholar
  11. 11.
    W.H. Julian, A. Toomre: Astroph. J., 146, 810 (1966)CrossRefADSGoogle Scholar
  12. 12.
    A. Kalnajs: 1971, Astroph. J., 166, 275 (1971)MathSciNetCrossRefADSGoogle Scholar
  13. 13.
    G. Mühlbauer, W. Dehnen: Astron. Astroph., 401, 975 (2003)CrossRefADSGoogle Scholar
  14. 14.
    J.P. Ostriker, P.J.E. Peebles: Astroph. J., 186, 467 (1973)CrossRefADSGoogle Scholar
  15. 15.
    A. Toomre: Astroph. J., 139, 1217 (1964)CrossRefADSGoogle Scholar
  16. 16.
    A. Toomre: Ann. Rev. Astron. Astroph., 15, 437 (1977)CrossRefADSGoogle Scholar
  17. 17.
    A. Toomre: What amplifies the spirals? In: The Structure and Evolution of Normal Galaxies ed by S.M. Fall, D. Lynden-Bell (Cambridge Univ. Press, Cambridge 1981) pp 111–136Google Scholar
  18. 18.
    M.D. Weinberg: Mon. Not. R. Astron. Soc., 213, 451 (1985)ADSGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Burkhard Fuchs
    • 1
  1. 1.Astronomisches Rechen-InstitutHeidelbergGermany

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