Physics
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976soph...49..343b&link_type=abstract
Solar Physics, vol. 49, Aug. 1976, p. 343-358.
Physics
29
Electron Distribution, Gamma Rays, Microwave Emission, Particle Acceleration, Solar Flares, X Ray Spectra, Bremsstrahlung, Energy Dissipation, Energy Spectra, Relativistic Particles, Solar Electrons, Solar Magnetic Field, Solar Protons, Time Dependence
Scientific paper
Relativistic electrons in large solar flares produce gamma-ray continuum by bremsstrahlung and microwave emission by gyrosynchrotron radiation. Using observations of the August 4, 1972, flare, a detailed evaluation is made of the electron spectrum and the physical properties (density, magnetic field, size, and temperature) of the common emitting region of these radiations. Information is also obtained on energetic protons in this flare by using gamma-ray lines. From the electron spectrum, the proton-to-electron ratio, and the time dependences of the microwave emission, the 2.2-MeV line, and the gamma-ray continuum, it is concluded that relativistic electrons and energetic nuclei are accelerated in large solar flares by a mechanism which is different from the mechanism which accelerates electrons with energies not exceeding about 100 keV in flares.
Bai Taeil
Ramaty Reuven
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