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Interstellar Scintillation and Clouds of the Interstellar Turbulent Plasma

  • V. I. Shishov
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Abstract

Data on interstellar diffraction and refraction scintillation of pulsars are analyzed. Comparisonbetween theory and the observational data shows that two types of spectra for electron densityfluctuations are realized in the interstellar medium: pure power law and piecewise with a break.The distribution of turbulent plasma in the Galaxy has a three component structure. Component Ais diffuse and it is distributed outside of the spiral arms of the Galaxy. Component BI is cloudyand associated with Galactic arms. Component BII is extremely nonuniform and associated withHII regions and supernova remnants. The origin of the interstellar plasma turbulence is considered,and possible sources of turbulent energy are discussed. The contribution of supernova bursts in theinterstellar gas ionization and generation of turbulence are analyzed among other factors.

Keyword

Interstellar plasma; Scintillation; Turbulence 

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References

  1. Blanford, M. and Narayan, M.: 1985, Low frequency variability of pulsars, MNRAS 213(3), 591–611.ADSGoogle Scholar
  2. Cordes, J.M. and Rickett, B.J.: 1998, Diffractive interstellar scintillation timescales and velocities, Astrophys. J. 502(2), 846–860.ADSCrossRefGoogle Scholar
  3. Cordes, J.M., Weisberg, J.M. and Boriakoff, Y.: 1985, Small scale electron density turbulence in the interstellar medium, Astrophys. J. 288(10), 221–247.ADSCrossRefGoogle Scholar
  4. Martin, J.M. and Flatte, S.M.: 1988, Intensity images and statistics from numerical simulation of wave propagation in 3-D random media, Applied Optics 27(11), 2111–2126.ADSCrossRefGoogle Scholar
  5. Prokhorov, A.M., Bunkin, V.F., Gochelashvily, K.S. and Shishov, V.I.: 1975, Laser irradiance propagation in turbulent media, Proc. IEEE 63(5), 790–811.Google Scholar
  6. Pynzar’, A.V and Shishov, V.I.: 1997, Distribution of turbulent interstellar plasma in the Galaxy, Astron. Rep. 41(5), 663–670.Google Scholar
  7. Pynzar’, A.V and Shishov, V.I.: 1999, Clouds of turbulent interstellar plasma in the spiral arms of the Galaxy, Astron. Rep. 43(7), 504–513.Google Scholar
  8. Pynzar’, A.V and Shishov, V.I.: 2001, Correlation between distributions of pulsars and emission measure in the Galaxy, Astron. Rep. 45(7), 502–503.ADSCrossRefGoogle Scholar
  9. Rickett, B.J.: 1969, Frequency structure of pulsar intensity variations, Nature 221(5176), 158–159.ADSCrossRefGoogle Scholar
  10. Rickett, B.J., Coles, W.A. and Bourgois, G.: 1984, Slow scintillation in the interstellar medium, A&A 134(2): 390–395.ADSGoogle Scholar
  11. Sheuer, P.A.G.: 1968, Amplitude variations in pulsed radio sources, Nature 218(5145): 920–922.ADSCrossRefGoogle Scholar
  12. Shishov, V.I.: 1992, Theory of wave scintillations, in: V.I. Tatarski, A. Ishimaru and V.U. Zavorotny (eds.), Waves in Random Media (Scintillation)}, Invited papers of a conference held 3–7 August 1992, Seattie, Washington, pp. 272–2Google Scholar
  13. Shishov, V.I.: 1995, Effect of refraction scintillations on the response of an interferometer, WRM 5(4), 497–507.ADSGoogle Scholar
  14. Sieber, W.: 1982, Causal relationship between pulsar long-time intensity variations and the interstellar medium, A&A 113(2), 311–313.ADSGoogle Scholar
  15. Smirnova, T.V, Shishov, V.I. and Stinebring, D.: 1998, Refractive interstellar scintillations of pulsars, Astron. Rep. 42(6), 766–778.ADSGoogle Scholar
  16. Stinebring, D.R., Faison, M.D. and McKinnon, M.M.: 1996, Refractive and diffractive scintillation of the pulsar PSR B0329+54, Astrophys. J. 460(1), 460–469.ADSCrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media Dordrecht 2001

Authors and Affiliations

  • V. I. Shishov
    • 1
  1. 1.P.N. Lebedev Physical InstituteMoscowRussia

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