Evolution and flare activity of a group in July 1978

Details Evolution and flare activity of a group in July 1978 Evolution and flare activity of a group in July 1978

Apr 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983azh....60..350s&link_type=abstract

(Astronomicheskii Zhurnal, vol. 60, Mar.-Apr. 1983, p. 350-360) Soviet Astronomy (ISSN 0038-5301), vol. 27, Mar.-Apr. 1983, p. 2

Astronomy and Astrophysics

Astronomy

1

Solar Flares, Solar Magnetic Field, Sunspots, Evolution (Development), Filtergrams, H Alpha Line, Magnetic Field Configurations, Solar Activity

Scientific paper

Photoheliograms, H-alpha filtergrams, and wideband photographs are the basis of the present study of the evolution of a sunspot group, having a delta configuration, which passed over the solar disk on July 8-21, 1978. A comparison of the evolutionary changes of the group with the active region's flare activity indicated that the latter is connected with the formation of a new sunspot group within an old one. New nuclei are formed along the zero line of the old group's longitudinal field, and the nodes for the majority of flares are located near new nuclei, symmetrically relative to the zero line. As a result of the development of new nuclei near old ones, the small nuclei break up, while the boundary of the large nucleus is deformed on the side of the new nuclei and bright points shine within it.

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