Physics
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978aujph..31..547r&link_type=abstract
Australian Journal of Physics, vol. 31, Dec. 1978, p. 547-560.
Physics
Brightness Temperature, Circular Polarization, Electrostatic Probes, Solar Corona, Synchrotron Radiation, Very High Frequencies, Absorptivity, Energy Distribution, Optical Thickness, Plasma Density, Radiative Transfer, Radio Emission, Relativistic Particles
Scientific paper
Synchrotron and Langmuir-wave emission processes are compared, with special emphasis being placed on meter-wavelength radiation from the solar corona. Numerical calculations are presented which relate to brightness temperature, circular polarization, and source structure. It is found that both gyrosynchrotron and Langmuir processes can produce brightness temperatures up to about 2-3 GK; larger temperatures require induced Langmuir-wave emission. It is further shown that gyrosynchrotron source positions observed at different frequencies may have a dispersion in height within an inhomogeneous background medium. Although many observations may be explained exclusively by one of the two processes, there are numerous circumstances in which both processes are equally likely.
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