Analysis of the expanding flare loops of C8.5/1F April 2, 2001 flare

Details Analysis of the expanding flare loops of C8.5/1F April 2, 2001 flare Analysis of the expanding flare loops of C8.5/1F April 2, 2001 flare

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..677k&link_type=abstract

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

Physics

1

Solar Flares, Magnetic Field

Scientific paper

Evolution of the flare loops observed in TRACE 171 Å line, 1600 Å continuum and Hα line (Modra Observatory) during the C8.5/1F, April 2, 2001 flare is analyzed (NOAA AR 9393). The expansion of the flare loops at their tops is recognized nearly co-spatially at the hot TRACE 171 Å as well as cold Hα line and 1600 Å continuum. Due to the visibility of Hα structures in emission against the disc we assume that this demands relatively high plasma electron densities (~1012cm-3). Prior to the expansion of the loops a high density plasma injection into them was observed. Detailed analysis shows that plasma parameters are close to the ballooning instability threshold, especially in regions close to the null point of the extrapolated magnetic field.

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