Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001chjaa...1..365z&link_type=abstract
Chinese Journal of Astronomy & Astrophysics, Vol. 1, pp. 365-371
Astronomy and Astrophysics
Astrophysics
1
Sun: Activity, Sun: Radio Radiation, Sun: Magnetic Fields
Scientific paper
The harmonic structures of the gyrosynchrotron radiation are studied and compared with the results of the electron cyclotron maser instability. The structures only appear at lower harmonics (s < 10), and their peaks deviate by a small amount from integer harmonic numbers. The amplitudes of harmonic structures of the extraordinary modes are usually larger than that of the ordinary modes. The numbers and amplitudes of harmonic structures increase with increasing electron energy spectral index δ and propagation angle θ. All the properties of harmonic structures are consistent with the predictions of the electron cyclotron maser instability in an extremely magnetized plasma on the basis of Maxwell and Vlasov equations. The physical relations between gyrosynchrotron radiation and cyclotron maser instability and a possible application of the properties of the harmonic structures are discussed.
Huang Guang Li
Zhou Ai-Hua
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