Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006ssrv..122..137k&link_type=abstract
Space Science Reviews, Volume 122, Issue 1-4, pp. 137-148
Astronomy and Astrophysics
Astrophysics
3
Sun:Flares, Sun:Magnetic Loops, Sun:Oscillations, Sun:Microwave Radiation
Scientific paper
Low-frequency (LF) modulations of the solar microwave radiation (37 GHz) recorded at the Metsähovi Radio Observatory, are analyzed. Since the intensity of solar microwave radiation, produced by the electron gyrosynchrotron mechanism, is dependent on a value of the background magnetic field [Dulk, G. A.: 1985, Ann. Rev. Astron. Astrophys. 23, 169 224], slow variations of the magnetic field associated with disturbances of the electric current in a radiating source, can modulate the intensity of the microwave radiation. The observed multi-track features of the LF spectra are interpreted as a signature of a complex multi-loop structure of the radiating source. Application of the equivalent electric circuit models of interacting loops allows to explain and reproduce the main dynamical features of the observed LF modulation dynamic spectra.
Khodachenko Maxim L.
Kislyakov Albert G.
Rucker Helmet O.
Urpo Seppo
Zaitsev Valerii V.
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