Fast flux and polarization periodic time structure of microwave solar bursts

Details Fast flux and polarization periodic time structure of microwave solar bursts Fast flux and polarization periodic time structure of microwave solar bursts

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977cosp.meetq....k&link_type=abstract

COSPAR, Plenary Meeting, 20th, Tel Aviv, Israel, June 7-18, 1977, Paper. 6 p. Research supported by the Fundacao de Amparo a Pe

Mathematics

Microwave Emission, Polarized Radiation, Solar Flux Density, Solar Radio Bursts, Circular Polarization, Faculae, Periodic Variations

Scientific paper

Results are reported for polarimetric observations of the sun at a frequency of 7 GHz during a period of significant solar activity associated with McMath plage 14143. It is shown that the S component associated with the plage produced a flux excess of nearly 20 percent at its central meridian passage and that the polarization of the S component remained left-handed during the entire half-rotation, displaying an apparent dependence on heliographic longitude. Two microwave bursts are examined which exhibited short-time-scale quasi-periodic flux structures without any corresponding structures in degree of circular polarization. One of these bursts is found to have had an approximately 4.7-sec oscillation, which persisted for the entire event, superimposed on its temporal flux development. It is noted that the degree of polarization remained stable with respect to this oscillation and that the amplitude of the oscillation at any given moment during the event was proportional to the flux density at that moment.

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