Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988baicz..39...26b&link_type=abstract
Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 39, Jan. 1988, p. 26-29.
Astronomy and Astrophysics
Astronomy
1
Chromosphere, H Alpha Line, Light Scattering, Solar Activity, Solar Magnetic Field, Energy Sources, Solar Flares, Sunspots, Telescopes
Scientific paper
The solar chromosphere in active region BBR 18,474 (July 15-16, 1982) is characterized on the basis of vector magnetograms (in the 525.02-nm line of Fe I) and H-alpha filtergrams obtained at Potsdam using the instruments, techniques and data-reduction procedures described by Bachmann et al. (1975 and 1983) and photoheliograms obtained at Debrecen Observatory. The results are presented graphically and characterized in detail. Transverse magnetic fields of up to 1.4 kG are observed, and the neutral-line filament is found to be located near the minimum field magnitude outside the sunspot group, along the longitudinal-field inversion line inside the sunspot group, and along the direction of the transverse field in the delta area (consistent with strong magnetic-field shear). The flare energy in this active region is attributed to sunspot proper motions.
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