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Cosmic Research

, Volume 46, Issue 5, pp 392–395 | Cite as

Instability of entropy waves in cosmic plasma

  • B. V. Somov
  • N. S. Dzhalilov
  • J. Staude
Short Communications

Abstract

A dispersion equation is derived for small disturbances of the magnetohydrodynamic type in optically transparent plasma with cosmic abundance of elements. The electron heat conductivity along the magnetic field and proton heat conductivity across the field are taken into account. It is shown that entropy waves increase exponentially in wide ranges of temperatures and densities of the cosmic plasma. Manifestations of instability of the entropy waves in the cosmic plasma are discussed.

PACS

52.30.Cv 94.05.-a 95.30.Qd 

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References

  1. 1.
    Blokhintsev, D.I., Moving Receiver of Sound, Dokl. Akad. Nauk SSSR, 1945, vol. 47, pp. 22–25.Google Scholar
  2. 2.
    Landau, L.D. and Lifshitz, E.M., Gidrodinamika (Hydrodynamics), Moscow: Nauka, 1986.Google Scholar
  3. 3.
    Zeldovich, Ya.B. and Novikov, I.D., Stroenie i evolutsiya Vselennoi (Structure and Evolution of the Universe), Moscow: Nauka, 1975. Translated under the title Relativistic Astrophysics, vol. 2: The Structure and Evolution of the Universe, Chicago: Chicago Univ., 1983.Google Scholar
  4. 4.
    Syrovatskii, S.I., Stability of Shock Waves in Magnetic Hydrodynamics, Zh. Eksp. Teor. Fiz., 1958, vol. 35, pp. 1466–1470.Google Scholar
  5. 5.
    Somov, B.V., Plasma Astrophysics. Part II, Reconnection and Flares, New York: Springer, 2006.Google Scholar
  6. 6.
    Spitzer, L., Jr., Physics of Fully Ionized Gases, New York: Interscience, 1962.Google Scholar
  7. 7.
    Cox, D.P. and Tucker, W.H., Ionization Equilibrium and Radiative Cooling of a Low-Density Plasma, Astrophys. J., 1969, vol. 157, pp. 1157–1167.CrossRefADSGoogle Scholar
  8. 8.
    Kadomtsev, B.B., Hydrodynamic Stability of Plasma, in Voprosy teorii plazmy, (Issues of Plasma Theory), Leontovich, M.A., Ed., Moscow: Gosatomizdat, 1963, vol. 2, pp. 132–176.Google Scholar
  9. 9.
    Landi, E., Del Zanna, G., Young, R.P., et al., Astrophys. J. Suppl., 2006, vol. 162, pp. 261–274.CrossRefADSGoogle Scholar
  10. 10.
    Imshennik, V.S. and Bobrova, N.A., Dinamika stolknovitel’noi plazmy (Dynamics of Collisional Plasma), Moscow: Energoatomizdat, 1997.Google Scholar
  11. 11.
    Aschwanden, M.J., Physics of Solar Corona, Berlin: Springer, 2004.Google Scholar
  12. 12.
    Kumar, N., Kumar, P., and Singh, S., Coronal Heating by MHD Waves, Astron. Astrophys., 2006, vol. 453, pp. 1067–1078.CrossRefADSGoogle Scholar

Copyright information

© MAIK Nauka 2008

Authors and Affiliations

  • B. V. Somov
    • 1
  • N. S. Dzhalilov
    • 2
    • 3
  • J. Staude
    • 4
  1. 1.Sternberg Astronomical InstituteMoscowRussia
  2. 2.Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave PropagationRussian Academy of SciencesTroitsk, Moscow oblastRussia
  3. 3.Shamakhi Astrophysical ObservatoryAzerbaidjan Academy of SciencesBaku AzAzerbaidjan
  4. 4.Astrophysikalisches Institut PotsdamPotsdamGermany

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