Electron precipitation and mass motion in the 1991 June 9 white-light flare

We use H alpha line profiles as a diagnostic of mass motion and nonthermal electron precipitation in the white-light flare (WLF) of 1991 June 9 01:34 UT. We find only weak downflow velocities (approximately equals 10km/s) at the site of white-light emission, and comparable velocities elsewhere. We a...

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Bibliographic Details
Published in:Solar physics 1994-05, Vol.151 (2), p.389-392
Main Authors: Dela Beaujardiere, J. -F., Canfield, R. C., Metcalf, T. R., Hiei, E., Sakurai, T., Ichimoto, K.
Format: Article
Language:English
Subjects:
Astronomy
Chromosphere and chromosphere-corona transition. Spicules
Earth, ocean, space
Exact sciences and technology
Solar Physics
Solar system
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Summary:We use H alpha line profiles as a diagnostic of mass motion and nonthermal electron precipitation in the white-light flare (WLF) of 1991 June 9 01:34 UT. We find only weak downflow velocities (approximately equals 10km/s) at the site of white-light emission, and comparable velocities elsewhere. We also find that electron precipitation is strongest at the WLF site. We conclude that continuum emission in this flare was probably caused by nonthermal electrons and not by dynamical energy transport via a chromospheric condensation.
ISSN:0038-0938
1573-093X
DOI:10.1007/BF00679084