Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..431b&link_type=abstract
In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze
Physics
2
Sun: Coronal Mass Ejection, Microwave Radiation
Scientific paper
For the first time the post-eruptive arcade formation during Coronal Mass Ejection (CME-event 2000 November 23) has been registered in wide microwave range (1.7-30 cm) on the RATAN-600 radio telescope with analysis of circular polarization. The spectral characteristics of the intensive large (60"-80") radio source, associated with the EUV and soft X-ray post-eruptive brightening, (flat flux spectrum and square wavelength dependence of brightness temperature in the range of 1.7 cm-8 cm are in complete agreement with the free-free emission of optically thin plasma with the temperature of (3-3.5) MK and electron density of (2-3)109 cm-3. The strength of longitudinal component of coronal magnetic field of (100-300)G in the post-eruptive arcade has been estimated on the basis of measured degree of circular polarization (7-12)% at short cm-wavelengths. It is shown that the RATAN-600 observational data and those obtained on NoRH at 1.76 cm are in agreement.
Borovik Valeria N.
Gelfreikh George B.
Grigorieva Irina Y.
Medar' V. G.
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