Abstract
A plot of frequency separation in fine structure in solar continuum radio bursts against emission frequency indicates that the frequency structure cannot represent local proton plasma frequency modulation. However, the observations are consistent with the interpretation of the frequency structure as harmonics of the local electron cyclotron frequency and lead to reasonable estimates of the ratio between magnetic and kinetic pressures in stable coronal magnetic field configurations producing continuum radio sources.
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Rosenberg, H., Tarnstrom, G. Frequency separation in structure of solar continuum radio bursts. Sol Phys 24, 210–214 (1972). https://doi.org/10.1007/BF00231097
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DOI: https://doi.org/10.1007/BF00231097