Spectral-polarization behaviour of solar active region producing powerful flares

Details Spectral-polarization behaviour of solar active region producing powerful flares Spectral-polarization behaviour of solar active region producing powerful flares

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..279b&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

Flares, Magnetic Fields, Corona, Transition Region, Radio Emission

Scientific paper

Here we show that flare-productive active regions (FPAR) represent the special class of solar active regions. Their study by microwave observations in wide wavelength range with detailed spectral and polarization analysis is very informative, and directly detects plasma in the sites of primary energy release before flares. We have found out several new phenomena at microwaves during pre-flare and flare stages of FPARs on a time interval from several hours up to about several days. These phenomena occur in wide flux range (0.05 - 1.0 s.f.u.) in a narrow wavelength range (2-5 cm). Analysis of a number of FPAR's within 2001 has shown that the probability of such phenomena occurrence at microwaves is about 85%.

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