The M8.1 flare of 23 June, 1988. I - Secondary H-alpha brightenings in two-ribbon flares

Details The M8.1 flare of 23 June, 1988. I - Secondary H-alpha brightenings in two-ribbon flares The M8.1 flare of 23 June, 1988. I - Secondary H-alpha brightenings in two-ribbon flares

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..124..145h&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 124, no. 1, 1989, p. 145-155.

Physics

7

H Alpha Line, Magnetic Field Reconnection, Solar Flares, Solar Magnetic Field, Coronal Loops, Limb Brightening, Magnetic Field Configurations, X Ray Telescopes

Scientific paper

H-alpha observations of two-ribbon flares often show secondary brightenings which are not directly spatially connected with the main center of activity but which are correlated in time with the primary impulsive flare. A mechanism is presented which explains these secondary brightenings via the reconnection of magnetic loops which are tied to only one of the two ribbons, in contrast with the loops responsible for the main flare which are tied to both ribbons. The distant footpoint is then interpreted as the site of the secondary brightening. The model is applied to the two-ribbon flare of 17:52 UT, June 23, 1988, which started during the rocket flight of the Normal Incidence X-ray Telescope.

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