Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979acasn..20..153l&link_type=abstract
Acta Astronomica Sinica, vol. 20, June 1979, p. 153-160. In Chinese, with abstract in English.
Astronomy and Astrophysics
Astronomy
3
Radio Spectra, Solar Activity Effects, Solar Flares, Solar Spectra, Synchrotron Radiation, Type 4 Bursts, Cyclotron Resonance, Electromagnetic Absorption, Electron Radiation, Plasma Resonance, Solar Magnetic Field, Thermal Plasmas
Scientific paper
A mechanism is proposed to account for the U-shaped spectrum of the type IV solar radio burst during the explosive phase of proton flare. The U-shaped spectrum consists of two parts, namely the part of type IVmu burst and that of type IVdm burst. Each of them is believed to be produced by gyro-synchrotron radiation of nonthermal electrons (100 keV to 2 MeV) accelerated simultaneously with protons in explosive phase and gyroresonance absorption of thermal electrons. Numerical calculations are presented for the flux densities of type IVmu burst and type IVdm burst during the 7 August 1972 event. It is shown that the result of numerical calculations is consistent with that of observations.
Jiang Shi-Yang
Li Chong Sheng
Yao Jin-Xing
Zheng Xing-Wu
Zhou Ai-Hua
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