Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...308..685z&link_type=abstract
Astronomy and Astrophysics, v.308, p.685-696
Astronomy and Astrophysics
Astrophysics
8
Polarization, Radiation Transfer, Sun: Radio Radiation, Stars: Magnetic Fields, Radio Continuum: Solar System
Scientific paper
The plasma current sheet with a transverse component of magnetic field is analyzed as an efficient linear transformer of the electromagnetic extraordinary (X) and ordinary (O) modes. The analytical solutions and quantitative estimates show that, under the conditions of effective X-, O-mode coupling found in the paper, the polarization features of radio waves having passed through the sheet differ essentially from those calculated in the geometrical optics approximation. Thus, by means of the polarization observations, the linear X-, O-mode conversion may give the real data on the inhomogeneity and strength of the main and transverse components of magnetic field in the coupling region inside the sheet. The theory of mode coupling is applied to the calculation of the polarization features of solar radio emission that turn out to be well interpreted if the proper current sheet stabilized by a weak transverse magnetic field is situated in the solar corona on the pathway of radio waves toward the Earth.
Kocharovsky Vitaly V.
Kocharovsky Vl. V.
Zheleznyakov Vladimir V.
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