A study of surges and flares within an active region

Details A study of surges and flares within an active region A study of surges and flares within an active region

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993soph..146..163s&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 146, no. 1, p. 163-176.

Physics

20

Chromosphere, Coronal Loops, Magnetic Field Configurations, Magnetic Field Reconnection, Solar Corona, Solar Flares, Solar Magnetic Field, Carbon, H Alpha Line, Solar X-Rays, X Ray Spectra

Scientific paper

Active region 2684 was observed by the Solar Maximum Mission and ground-based observatories simultaneously for over 12 hours on September 23, 1980. During these observations, recurrent surges were detected above an area with complex parasitic magnetic polarity located at the periphery of the active region. The time evolution of the H-alpha surges, C IV brightenings and X-ray spikes leads to the conclusion that the energy source is in the corona, from magnetic reconnection. The energy is transported by energetic charged particles along the loops, thereby heating the chromosphere as the particles lose their energy. The divergent motion of the spots corresponding to small dipoles at the base of the surge indicates that there is important magnetic reorganization. According to the magnetic field-line configuration (large loop or open structures), X-rays can (or cannot) be associated with surges.

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