Abstract
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.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Cordes, J.M., M. Ryan, J.M. Weisberg, D.A. Frail, and S.R. Spangler: Nature 354, 121 (1991).
Fleishman, G.D.: Astrophys. J. 601, 559 (2004).
Fleishman, G.D., G.M. Nita, and D.E. Gary: Astrophys. J. 620, 506 (2005).
Fleishman, G.D.: Astro-ph/0502245 (2005).
Ginzburg, V.L. and S.I. Syrovatsky: Ann. Rev. Astron. Astrophys. 3, 297 (1965).
Honda, M. and Y.S. Honda: Astrophys. J. 617, L37 (2004).
Jaroschek, C.H., H. Lesch, and R.A. Treumann: Astrophys. J. 618, 822 (2005).
Jester, S., H.-J. Röser, K. Meisenheimer, and R. Perley: Astron. Astrophys. 431, 477 (2005).
Kundu, M.R., S.M. White, N. Gopalswamy, and J. Lim: Astrophys. J. Suppl. 90, 599 (1994).
LaBelle, J. and R. A. Treumann: Space Sci. Rev. 101, 295 (2002).
Melnikov, V.F. and A. Magun: Solar Phys. 178, 153 (1998).
Melrose, D.B. and J.C. Brown: Monthly Notic. Royal Astron. Soc. London 176, 15 (1976).
Migdal, A.B.: Dokl. Akad. Nauk SSSR (in Russian) 96, 49 (1954); Phys. Rev. 103, 1811 (1956).
Nikolaev, Yu.A. and V.N. Tsytovich: Phys. Scripta 20, 665 (1979).
Nita, G.M., D.E. Gary, and J. Lee: Astrophys. J. 605, 528 (2004).
Nita, G.M., D.E. Gary, and G.D. Fleishman: Astrophys. J. 629, L65 (2005).
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).
Platonov, K.Yu. and G.D. Fleishman: Physics-Uspekhi 45, 235 (2002).
Razin, V. A.: Radiofizika 3, 584 (1960).
Toptygin, I.N.: Cosmic rays in interplanetary magnetic fields (Dordrecht-Holland, D. Reidel, 1985) 387 pp.
Toptygin, I.N. and G.D. Fleishman: Astroph. Space Sci. 13, 213 (1987).
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.
Yermakova, E.N. and V.Yu. Trakhtengerts: Geomagn. Aeron. (Engl. Transl.) 21, 56 (1981).
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2006 Springer
About this chapter
Cite this chapter
Fleishman, G. (2006). Generation of Emissions by Fast Particles in Stochastic Media. In: LaBelle, J.W., Treumann, R.A. (eds) Geospace Electromagnetic Waves and Radiation. Lecture Notes in Physics, vol 687. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-33203-0_4
Download citation
DOI: https://doi.org/10.1007/3-540-33203-0_4
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-30050-2
Online ISBN: 978-3-540-33203-9
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)