Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...210..417r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 210, no. 1-2, Feb. 1989, p. 417-424. Research supported by CNES, CNRS, and NAS
Astronomy and Astrophysics
Astronomy
19
Radio Astronomy, Solar Corona, Solar Magnetic Field, Type 3 Bursts, Density Distribution, Electron Beams, Electron Density (Concentration), Frequency Distribution, Nonuniform Plasmas, Solar Spectrometers
Scientific paper
It is shown that the effects of density variations in the solar corona may be comparable to or greater than other effects in producing the time and frequency profiles of Type III bursts. A quantitative treatment of the density inhomogeneity effect is presented and a simple mathematical theory that incorporates a log-normal distribution for density variations in nonradial diverging flux tubes is presented. This theory successfully simulates dynamic spectrograms of Type III bursts from 50 to 400 MHz.
Pick Monique
Roelof Edmond C.
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