Induced compton scattering in radiative transfer

Details Induced compton scattering in radiative transfer Induced compton scattering in radiative transfer

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.200..881w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 200, Sept. 1982, p. 881-906. Research supported by the Science Research

Astronomy and Astrophysics

Astronomy

26

Coherent Scattering, Compton Effect, Radiation Distribution, Radiation Sources, Radiative Transfer, Atmospheric Attenuation, Brightness Temperature, Extragalactic Radio Sources, Polarization Characteristics, Radio Sources (Astronomy), Spheres, Thomson Scattering, Time Dependence

Scientific paper

The effect of induced Compton scattering (a nonlinear radiation-scattering mechanism relevant when the brightness temperature Tb is greater than 10 billion K) on the observed properties of sources is studies. The basic equations, including polarization, are derived. Radiative transfer, particularly in a spherical geometry, is studied. Characteristic effects give an apparent frequency-dependent structure in the source, and strong, frequency-dependent polarization. The interaction with other radiative processes within a source and the effect of an atmosphere optically thick to Thomson scattering are discussed. The main result is to suppress the radiation at frequencies below that where the suitably defined induced optical depth is unity. Time-dependent effects are investigated, and possible rapid variability and 'superlight' expansion effects explored. The application to astronomical sources, and compact extragalactic sources in particular, is discussed.

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