Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/2610
Title: Rapid polarization variability in intense sources
Authors: Gangadhara, R. T
Krishan, V
Keywords: Active Galactic Nuclei;Astronomical Models;Electromagnetic Radiation;Plasma-Electromagnetic Interaction;Polarization (Waves);Pulsars;Raman Spectra;Space Plasmas;Variability;Electric Fields;Electromagnetic Wave Transmissionn;Electron Plasman;Mathematical Models;Plasma Density;Plasma Waves
Issue Date: Feb-1995
Publisher: The American Astronomical Society
Citation: Astrophysical Journal, Part 1, Vol. 440, No. 1, p. 116 – 127
Abstract: We have recently reported the polarization changes of the intense electromagnetic radiation, in active galactic nuclei and pulsars, due to stimulated Raman scattering. In this paper, we show that the incident and the Raman-scattered radiation, when superimposed, exhibit highly complex and variable polarization patterns, some of which could account for the observed polarization variability in intense sources. Further, if the ratio of the frequencies of the incident and the scattered radiation is an irrational number, the electric field of the superimposed radiation traces a quasi-periodic rotation. The modulation of the Raman-scattered sideband modes, with even small perturbations due to the thermal radiation or the Raman cascade, would lead to chaotic rotation of the electric field of the superimposed radiation.
URI: http://hdl.handle.net/2248/2610
ISSN: 0004-637X
???metadata.dc.relation.uri???: http://adsabs.harvard.edu/abs/1995ApJ...440..116G
Appears in Collections:IIAP Publications

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