Generation of Emissions by Fast Particles in Stochastic Media

  • G.D. Fleishman
Part of the Lecture Notes in Physics book series (LNP, volume 687)


We demonstrate the potential importance of small-scale turbulence in the generation of radio emission from natural plasmas. This emission, being reliably detected and interpreted, probes small-scale turbulence in remote sources in the most direct way. The radiation emitted is called “diffusive synchrotron radiation” because it is related to shaking the electron distribution when passing through randomly distributed small-scale plasma inhomogeneities caused in turbulence. The emissivity is calculated and shown to be in the observable range. A further effect of inhomogeneities is transition radiation arising from fast particles which interact with small-scale density inhomogeneities. This emission process generates continuum emission below synchrotron and is applicable to some solar radio bursts. It serves for probing number densities. The effect of inhomogeneities on coherent emissions is either broadening or splitting of the spectral peaks generated by the electron cyclotron maser mechanism.


Synchrotron Radiation Spectral Index Radio Emission Coherence Length Fast Particle 
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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    Cordes, J.M., M. Ryan, J.M. Weisberg, D.A. Frail, and S.R. Spangler: Nature 354, 121 (1991). CrossRefGoogle Scholar
  2. [2]
    Fleishman, G.D.: Astrophys. J. 601, 559 (2004). CrossRefGoogle Scholar
  3. [3]
    Fleishman, G.D., G.M. Nita, and D.E. Gary: Astrophys. J. 620, 506 (2005). CrossRefGoogle Scholar
  4. [4]
    Fleishman, G.D.: Astro-ph/0502245 (2005). Google Scholar
  5. [5]
    Ginzburg, V.L. and S.I. Syrovatsky: Ann. Rev. Astron. Astrophys. 3, 297 (1965). CrossRefGoogle Scholar
  6. [6]
    Honda, M. and Y.S. Honda: Astrophys. J. 617, L37 (2004). Google Scholar
  7. [7]
    Jaroschek, C.H., H. Lesch, and R.A. Treumann: Astrophys. J. 618, 822 (2005). CrossRefGoogle Scholar
  8. [8]
    Jester, S., H.-J. Röser, K. Meisenheimer, and R. Perley: Astron. Astrophys. 431, 477 (2005). CrossRefGoogle Scholar
  9. [9]
    Kundu, M.R., S.M. White, N. Gopalswamy, and J. Lim: Astrophys. J. Suppl. 90, 599 (1994). CrossRefGoogle Scholar
  10. [10]
    LaBelle, J. and R. A. Treumann: Space Sci. Rev. 101, 295 (2002). CrossRefGoogle Scholar
  11. [11]
    Melnikov, V.F. and A. Magun: Solar Phys. 178, 153 (1998). CrossRefGoogle Scholar
  12. [12]
    Melrose, D.B. and J.C. Brown: Monthly Notic. Royal Astron. Soc. London 176, 15 (1976). Google Scholar
  13. [13]
    Migdal, A.B.: Dokl. Akad. Nauk SSSR (in Russian) 96, 49 (1954); Phys. Rev. 103, 1811 (1956). Google Scholar
  14. [14]
    Nikolaev, Yu.A. and V.N. Tsytovich: Phys. Scripta 20, 665 (1979).Google Scholar
  15. [15]
    Nita, G.M., D.E. Gary, and J. Lee: Astrophys. J. 605, 528 (2004). CrossRefGoogle Scholar
  16. [16]
    Nita, G.M., D.E. Gary, and G.D. Fleishman: Astrophys. J. 629, L65 (2005). Google Scholar
  17. [17]
    Platonov, K.Yu., I.N. Toptygin, and G.D. Fleishman: Uspekhi Fiz. Nauk (in Russian) 160, 59 (Engl. transl.: Sov. Phys. Uspekhi, 33, 289) (1990). Google Scholar
  18. [18]
    Platonov, K.Yu. and G.D. Fleishman: Physics-Uspekhi 45, 235 (2002). CrossRefGoogle Scholar
  19. [19]
    Razin, V. A.: Radiofizika 3, 584 (1960). Google Scholar
  20. [20]
    Toptygin, I.N.: Cosmic rays in interplanetary magnetic fields (Dordrecht-Holland, D. Reidel, 1985) 387 pp. Google Scholar
  21. [21]
    Toptygin, I.N. and G.D. Fleishman: Astroph. Space Sci. 13, 213 (1987). CrossRefGoogle Scholar
  22. [22]
    Vainshtein, S.I., A.M. Bykov, and I.N. Toptygin: Turbulence, Current Sheets, and Shocks in Cosmic Plasma (The Fluid Mechanics of Astrophysics and Geophysicæs, Vol. 6, Langhorne: Gordon and Breach Science Publ., 1993) 398 pp. Google Scholar
  23. [23]
    Yermakova, E.N. and V.Yu. Trakhtengerts: Geomagn. Aeron. (Engl. Transl.) 21, 56 (1981).Google Scholar

Copyright information

© Springer 2006

Authors and Affiliations

  • G.D. Fleishman
    • 1
  1. 1.National Radio Astronomy ObservatoryCharlottesville

Personalised recommendations