Damping Effects on Parametric Decays of Alfvén Waves

  • L. Gomberoff
  • J. A. Araneda
Conference paper


It is shown that damping effects can destabilize regions that are stable under non-dissipative fluid theory. Damping effects on the ion-acoustic modes are simulated by a collisional-like term in the longitudinal component of the fluid equations. It is shown that when there is only a beat wave instability, damping effects can destabilize modulational and decay-type instabilities. These results are in agreement with hybrid kinetic-fluid approaches and hybrid simulation codes.


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  1. Araneda, J.A.: 1998 Phys. Scripta T57, 164.ADSCrossRefGoogle Scholar
  2. Dobrowolny, M., Mangeney, A. and Veltri, P.: 1980, Astron. Astrophys. 83, 26.ADSGoogle Scholar
  3. Hollweg, J.V.: 1994, J. Geophys. Res. 99, 23,431.ADSCrossRefGoogle Scholar
  4. Marsch, E. and Tu, C.Y.: 1990, J. Geophys. Res. 95, 8211.ADSCrossRefGoogle Scholar
  5. Marsch, E. and Tu, C.Y.: 1993, J. Geophys. Res. 98, 21045.ADSCrossRefGoogle Scholar
  6. Muñoz, V. and Gomberoff, L.: 1998, Phys. Plasmas 5, 3171.ADSCrossRefGoogle Scholar
  7. Spangler, S.R.: 1992, The evolution of large-amplitude MHD waves near quasi-parallel shocks in the solar wind, in: E. Marsch and R. Shwenn (eds.), Solar Wind Seven, p. 539, Pergamon, New York.Google Scholar
  8. Tsurutani, B.T.: 1991, Nonlinear low frequency waves: Comets and foreshockphenomena, in: Physics and space Plasmas, p. 91, Scientific, Cambridge, Mass.Google Scholar
  9. Vasquez, B.J.: 1995, J. Geophys. Res. 100, 1779.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2001

Authors and Affiliations

  • L. Gomberoff
    • 1
  • J. A. Araneda
    • 2
  1. 1.Departamento de FÍsica, Facultad de CienciasUniversidad de ChileSantiagoChile
  2. 2.Departamento de Física, Facultad de Ciencias Físicas y MatemáticasUniversidad de ConcepciónConcepciónChile

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