Reversal of the sense of polarisation in solar and stellar radio flares

Details Reversal of the sense of polarisation in solar and stellar radio flares Reversal of the sense of polarisation in solar and stellar radio flares

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pasau..11...16m&link_type=abstract

Astronomical Society of Australia, Proceedings (ISSN 0066-9997), vol. 11, no. 1, p. 16-20

Astronomy and Astrophysics

Astrophysics

5

Faraday Effect, Polarized Electromagnetic Radiation, Solar Flares, Solar Magnetic Field, Solar Radio Emission, Stellar Rotation, Astrophysics, Coupled Modes, Radio Astronomy, Wave Propagation

Scientific paper

It is shown that numerical integration of the equation of polarisation transfer for generalised Faraday rotation provides an alternative to mode-coupling theory for treating propagation through a quasi-transverse (QT) region. At a QT region, where the sign of the component of the magnetic field along the ray path reverses, the sense of circular polarisation reverses below a frequency omegat, and is unchanged above omegat. There is along-standing difficulty in the interpretation of the polarisation of radio emission from bipolar regions on the Sun: observational and theoretical estimates of omegat appear inconsistent. The alternative approach may help resolve this difficulty.

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