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Flare onsets in hard and soft X-raysIt is shown that the onset of solar flares, within about 2 min or less before the impulsive peaks, is characterized by an increase in high-energy emission at E less than 100 keV, and strong broadening of soft X-ray lines characteristic of the 10-million-K plasma already present at this stage. The observations are interpreted in terms of the early signature of energy release, during a phase preceding the instability that leads to strong particle acceleration.
Document ID
19870052721
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Machado, Marcos E.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Orwig, Larry E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Antonucci, Ester
(Torino, Universita Turin, Italy)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Publication Information
Publication: Advances in Space Research
Volume: 6
Issue: 6, 19
ISSN: 0273-1177
Subject Category
Solar Physics
Accession Number
87A39995
Distribution Limits
Public
Copyright
Other

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