Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989baicz..40..311a&link_type=abstract
Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 40, no. 5, Sept. 1989, p. 311-320.
Astronomy and Astrophysics
Astronomy
1
Energy Distribution, Solar Activity, Solar Flares, Coronal Loops, H Alpha Line, Variance
Scientific paper
The mutual relationship of 18 geometrical and energy variables of 404 flares has been considered. It was found that (1) approximatelly 60 percent of the total variance of the system (x1 - x18) could be explained by 3 - 4 F(j) factors; (2) the lowest H-alpha loops of the flare arcade (x 13) have comparable mean dimensions for both studied flare groups (during the maximum H-alpha phase, the height of the lowest flare arcade loops is about 7000 km); (3) energetically significant 'major flares' acquire larger lengths of the flare ribbons, as well as ranges and volumes of the supplemental flare structures, than impulsive flares; and (4) commonly held views about simple relationships between H-alpha or SXR flare importance and the flare duration are in error. A relationship was found between H-alpha duration and the comprehensive flare index.
Antalová Anna
Jakimiec Maria
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