Physics
Scientific paper
Nov 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979soph...64..143r&link_type=abstract
Solar Physics, vol. 64, Nov. 1979, p. 143-157. Research supported by the Natural Sciences and Engineering Research Council of Ca
Physics
1
Emission Spectra, Light Emission, Microwave Emission, Solar Flares, Photosphere, Radio Bursts, Spectrum Analysis, Synchrotron Radiation
Scientific paper
The paper compares the optical and microwave emissions of some major solar flares. The relations between the frequency of maximum radio flux fmax and the magnetic field strength at the photosphere Bp are investigated along with the relationship between the maximum radio flux Fmax and the field and its scale L for two differing flares occurring above very different photospheric conditions. It is shown that the simple relations predicted by the gyro-synchrotron emission mechanism fmax from the observed photospheric field Bp and Fmax of approximately B2L2 (where B scales as the photospheric field and L is the depth of the magnetic dipole beneath the photosphere used to approximate the field geometry of the corona) account for the flares producing microwave bursts of about the same Fmax, but of differing fmax. Finally, the spectra of type IVmu radio bursts with three large photon flares were analyzed showing that the decimetric peak vanishes with the onset of the first optical loops.
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