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On some spectrographic observations related to the structure with height of active regions and particularly solar flares

Published online by Cambridge University Press:  14 August 2015

Yngve Öhman
Yngve Öhman*
Affiliation:
Stockholm Observatory, Saltsjøbaden, Sweden

Abstract

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A peculiar kind of double-peaked Hα lines in solar flare spectra is described. The most likely explanation to this phenomenon is an absorption in the centre of the line due to mottles and fibrils situated above the flare. Another explanation might be a rapid rotatory mass motion in the filamentary structure of the flare itself. In some other flare spectra a slight inclination of the Hα-emission streak has been found indicating as well that rotatory mass motions may be present in flares.

Type
Part III: Optical Structure of an Active Region
Information
Symposium - International Astronomical Union , Volume 35: Structure and Development of Solar Active Regions , 1968 , pp. 240 - 246
Copyright
Copyright © Reidel 1968 

References

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