Computer Science
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989itps...17..252l&link_type=abstract
IEEE Transactions on Plasma Science (ISSN 0093-3813), vol. 17, April 1989, p. 252-258.
Computer Science
2
Active Galactic Nuclei, Compton Effect, Electrostatic Waves, Plasma Frequencies, Relativistic Electron Beams, Synchrotron Radiation, Debye Length, Galactic Clusters, Landau Damping, Optical Thickness
Scientific paper
The observable consequences of nonlinear microscopic plasma processes in active galactic nuclei are discussed. The combination of several elementary momentum-gain (shock acceleration and stochastic acceleration) and momentum-loss processes (synchroton radiation and inverse Compton scattering) produces an almost monoenergetic distribution function of relativistic electrons, called the pile-up, which excites Langmuir waves. Turbulent wave-wave and wave-particle interactions lead to nonlinear stabilization of the pile-up. The temporal and spatial evolution of the Langmuir waves and the relativistic electrons determines the shape and time scale of the spectral variations. The model is applied to extragalactic nuclei and to the Galactic center as well.
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