Relationship between the spectrum and directivity of solar radio bursts

Details Relationship between the spectrum and directivity of solar radio bursts Relationship between the spectrum and directivity of solar radio bursts

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991ge%26ae..31..357s&link_type=abstract

Geomagnetizm i Aeronomiia (ISSN 0016-7940), vol. 31, Mar.-Apr. 1991, p. 357-359. In Russian.

Physics

Bremsstrahlung, Interplanetary Magnetic Fields, Radiation Spectra, Solar Radio Bursts, Spatial Distribution, Directivity, Radial Distribution, Solar Activity, Solar Limb

Scientific paper

It is shown that the character of the spatial directivity of solar radio bursts is determined by the frequency of the spectral maximum. This is explained by differences in the locations of the sources and the orientation of the corresponding magnetic fields. Specifically, 'low-frequency' 3-5 GHz bursts of a magnetobremsstrahlung nature are generated in quasi-tangential fields near magnetic loop apexes while 'high-frequency' 9-15 GHz bursts are generated in the stronger quasi-radial field at loop bases.

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