Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983acaps...2..299y&link_type=abstract
(Acta Astrophysica Sinica, vol. 2, no. 4, 1982, p. 299-307) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 7, March 1
Astronomy and Astrophysics
Astrophysics
Decimeter Waves, Type 4 Bursts, Wave Interaction, Electrostatic Waves, Nonlinear Systems, Transverse Waves, Whistlers
Scientific paper
A wave-wave interaction is used to explain the spectrum of the Type IV burst component of the solar radio emission. Nonthermal electrons accelerated during the explosive phase are captured in the coronal magnetic bottle and form the burst source. These anisotropic electrons simultaneously excite low-frequency whistler waves and high-frequency Langmuir waves, and the nonlinear coupling of the two kinds of waves produces the transverse waves of the bursts. Also, the modulation of the high-frequency waves by the low-frequency ones produces the oscillating characteristic of the decimetric bursts. The large Type IV burst of Aug. 2, 1972 is used in a numerical calculation and is discussed.
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