Measurements of magnetic fields in solar corona as based on the radio observations of the inversion of polarization of local sources at microwaves

Details Measurements of magnetic fields in solar corona as based on the radio observations of the inversion of polarization of local sources at microwaves Measurements of magnetic fields in solar corona as based on the radio observations of the inversion of polarization of local sources at microwaves

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987soph..108...89g&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 108, no. 1, 1987, p. 89-97.

Physics

37

Circular Polarization, Radio Observation, Solar Activity, Solar Corona, Solar Magnetic Field, Sunspots, Angular Resolution, Radio Telescopes, Solar Atmosphere, Transverse Waves, Wave Propagation

Scientific paper

The possibility of measuring magnetic fields of solar active regions at coronal heights up to 1010cm by observing the inversion of circular polarization of local sources at microwaves is demonstrated. It is found that the inversion of polarization occurred within the core of a local source situated above the largest sunspot of McMath 14822. The measured coronal magnetic field of ≈16 G is found to be at the height ≈12×109cm. This measured field proves to agree with a simulated potential structure of the McMath 14822 coronal magnetic field. The analysis of the inversion has been based on the theory of interaction (coupling) of the ordinary and extraordinary wave modes in the region of quasi-transverse propagation.

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