Abstract
It is proposed that the region containing fast particles, electrostatic and electromagnetic fields, around active galactic nuclei is responsible for generating electromagnetic emissions from γ-rays to radio waves. The electrons are accelerated by Langmuir turbulence originating through the process of Raman forward scattering (RFS). The radiation mechanism is stimulated Raman backward scattering (RBS) where the fast electron beam loses energy by scattering over spatially periodic magnetic field. The spatially periodic magnetic field results from the magnetic modulational instability of the Langmuir waves. This model accounts well for the large luminosities observed in active galactic nuclei over γ-rays to radio waves and in addition it relates physically the emission regions at different wavelengths.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Apparao, K. M. V. et al.: 1978,Nature 273, 450.
Belkov, S. A. and Tsytovich, V. N.: 1979,Soviet Phys. JETP 49(4), 656.
Belkov, S. A. and Tsytovich, V. N.: 1982,Phys. Scripta 25, 416.
Fabian, A. C. and Rees, M. J.: 1979, in W. A. Baity and L. E. Peterson (eds.),X-Ray Astronomy, Pergamon, London, p. 381.
Hasegawa, A.: 1978,Bell Syst. Tech. J. 57, No. 8.
Joshi, C.: 1982,The Challenge of Ultra-High Energies, Proceedings of the EFCA-RAL meeting held at New College Oxford, Sept. 1982, p. 195.
Krishan, V.: 1983,Astrophys. Letters 23(3), 133.
Longair, M. S.: 1981,High-Energy Astrophysics, Cambridge University Press, Cambridge, p. 337.
Pacini, F. and Salvati, F.: 1978,Astrophys. J. 225, L99.
Pacini, F. and Salvati, F.: 1982, in D. S. Heeschen and C. M. Wade (eds.), ‘Extragalactic Radio Sources’,IAU Symp. 97, 247.
Parker, E. N.: 1965,Space Sci. Rev. 4, 666.
Rees, M. J.: 1982,The Challenge of Ultra-High Energies, Proceedings of the EFCA-RAL meeting held at New College Oxford, Sept. 1982, p. 317.
Swanenburg, B. N. et al.: 1978,Nature 275, 298.
Tajima, T. and Dawson, J. M.: 1979,Phys. Rev. Letters 43, 267.
Tajima, T.: 1982,The Challenge of Ultra-High Energies, Proceedings of the EFCA-RAL meeting held at New College Oxford, Sept. 1982, p. 195.
Tsytovich, V. N.: 1983,Comm. Plasma Phys. Controlled Fusion 7, 155.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Krishan, V. Acceleration and radiation processes around active galactic nuclei. Astrophys Space Sci 115, 119–126 (1985). https://doi.org/10.1007/BF00653832
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00653832