Propagation of radio waves in the inhomogeneous magnetic field of the solar corona

Details Propagation of radio waves in the inhomogeneous magnetic field of the solar corona Propagation of radio waves in the inhomogeneous magnetic field of the solar corona

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978raf....20.1444z&link_type=abstract

(Radiofizika, vol. 20, no. 9, 1977, p. 1444-1461.) Radiophysics and Quantum Electronics, vol. 20, no. 9, Mar. 20, 1978, p. 997-1

Physics

Nonuniform Magnetic Fields, Radio Transmission, Solar Corona, Solar Magnetic Field, Solar Radio Emission, Coupled Modes, Neutral Sheets, Plasma-Electromagnetic Interaction, Polarization Characteristics, Rarefied Plasmas, Wave Equations

Scientific paper

Different types of linear coupling between ordinary and extraordinary waves in a coronal plasma with a nonuniform magnetic field are investigated along with the effect of such coupling on the polarization properties of solar radio emission. A qualitative analysis of the wave propagation equation indicates that in a rarefied plasma coupling effects may occur in a sufficiently weak magnetic field or at angles close enough to zero or pi/2 between the magnetic field and the wave propagation direction. Wave-coupling parameters are obtained for these three cases. Radio-wave propagation through a region with a quasi-transverse magnetic field and through a neutral current sheet is examined in detail. In the second case a special type of linear coupling is found to arise when a wave passes from one region of quasi-transverse propagation to another via a zero-magnetic-field region. The role of such coupling effects in producing the polarization properties of solar radio emission is clarified for the cases of centimeter waves, meter waves, microwave bursts, and the s-component.

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