Astronomy and Astrophysics – Astronomy
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.262..151g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 262, no. 1, p. 151-163.
Astronomy and Astrophysics
Astronomy
31
Active Galactic Nuclei, Electron-Positron Plasmas, Magnetohydrodynamic Stability, Plasma Radiation, Plasma-Electromagnetic Interaction, Relativistic Plasmas, Nonuniform Plasmas, Pulsars, Radio Sources (Astronomy)
Scientific paper
The modulational instability of a large-amplitude, linearly polarized electromagnetic wave propagating in an electron-positron plasma is considered, including the combined effect of relativistic mass variation of the plasma particles, harmonic generation, and the nonresonant, finite-frequency electrostatic density perturbations, all caused by the large-amplitude radiation field. The radiation from many strong sources, such as AGN and pulsars, has been observed to vary over a host of time-scales. It is possible that the extremely rapid variations in the nonthermal continuum of AGN, as well as in the nonthermal radio radiation from pulsars, can be accounted for by the modulational instabilities to which radiation may be subjected during its propagation out of the emission region.
Gangadhara R. T.
Kant Shukla Padma
Krishan Vinod
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