Fine scale radio studies of the sun

Details Fine scale radio studies of the sun Fine scale radio studies of the sun

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977tuft.rept.....l&link_type=abstract

Technical Report, 1 Aug. 1976 - 1 Oct. 1977 Tufts Univ., Medford, MA. Dept. of Physics.

Physics

Forecasting, Radio Interferometers, Solar Activity, Solar Flares, Millimeter Waves, Polarization, Sunspots

Scientific paper

Major flare eruptions in solar active regions create geophysical disturbances which may seriously disrupt Air Force communication and surveillance systems. This report discusses interferrometric observations of solar active regions at centimeter wavelengths which show that the emission comes from sources which are only a few seconds of arc in size. The circular polarization of these small-scale features indicates a direct connection with the magnetic fields in active regions. Significant changes in the circular polarization of the fine scale regions only occurs in the few hours prior to flare eruptions. This result suggests that it is changes in magnetic field configurations which trigger flare emission, and that routine observations of the small-scale trigger sources might lead to a reliable flare forecast technique.

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