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Hα line profile observations of a limb flare with high temporal resolution

✍ Scribed by M. Graeter

Publisher
Springer
Year
1990
Tongue
English
Weight
556 KB
Volume
130
Category
Article
ISSN
0038-0938

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✦ Synopsis

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

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