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An Observed Correlation Between the Flux Densities of Extended Hard X-ray and Microwave Solar Bursts

Published online by Cambridge University Press:  14 August 2015

R. T. Stewart  and
G. J. Nelson
R. T. Stewart
Affiliation:
Division of Radiophysics, CSIRO, Sydney, Australia
G. J. Nelson
Affiliation:
Division of Radiophysics, CSIRO, Sydney, Australia

Extract

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Crannell et al. (1978) have reported an observed correlation between the time profiles and flux densities of impulsive hard x-ray and microwave solar bursts. We report here on a significant correlation between the fluxes of extended bursts of hard x-rays and microwaves. The significance of our observations follows from the suggestion of Wild, Smerd and Weiss (1963) that the extended bursts are evidence for a second phase acceleration process in the corona. We show that the observed characteristics of these extended microwave bursts (viz. rather a flat spectrum below a turnover frequency which is independent of intensity) can be explained by gyrosynchrotron radiation from the same population of energetic (E ~ 100 keV) electrons as those emitting thin-target x-ray bremsstrahlung.

Type
Session IV - Solar Bursts - Meter Wavelengths
Information
Symposium - International Astronomical Union , Volume 86: Radio Physics of the Sun , 1980 , pp. 281 - 283
Copyright
Copyright © Reidel 1980 

References

Crannell, C. J., Frost, K. J., Mätzler, C., Ohki, K. and Saba, J. L.: 1978, Astrophys. J. 223, 620.CrossRefGoogle Scholar
Takakura, T.: 1972, Solar Phys. 26, 151.Google Scholar
Wild, J. P., Smerd, S. F. and Weiss, A. A.: 1963, Ann. Rev. Astr. Astrophys. 1, 291.Google Scholar