H-alpha profile observations of a limb flare with high temporal resolution

Details H-alpha profile observations of a limb flare with high temporal resolution H-alpha profile observations of a limb flare with high temporal resolution

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990soph..130..337g&link_type=abstract

(Committee of European Radio Astronomers, SNSF, URSI, et al., Workshop on Particle Beams in the Solar Atmosphere, Braunwald, Swi

Physics

14

H Alpha Line, Line Spectra, Solar Flares, Solar Limb, Temporal Resolution, Imaging Spectrometers, Solar Spectra, Solar X-Rays, Spectrum Analysis

Scientific paper

The impulsive phase of a 1N/M2.0 limb flare on September 8, 1988 was observed in H-alpha with high temporal resolution. With an imaging spectrograph line profiles have been acquired every 2.3 sec. The temporal evolution in the blue and red wing has been correlated with hard X-ray data from HXRBS. It is shown that a prominent spike in the blue wing of H-alpha was delayed with respect to the corresponding hard X-ray burst by 7-8 sec. With the exception of the spike in the blue wing of H-alpha, the temporal development of the line profile is compatible with the predictions for nonthermal electron heating during the impulsive phase.

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