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Interrelation of soft and hard X-ray emissions during solar flares. I - ObservationsThe interrelation between the acceleration and heating of electrons and ions during impulsive solar flares is determined on the basis of simulataneous observations of hard and soft X-ray emission from the Solar Maximum Mission at high time resolution (6 s). For all the flares, the hard X-rays are found to have a power-law spectrum which breaks down during the rise phase and beginning of the decay phase. After that, the spectrum changes to either a single power law or a power law that breaks up at high energies. The characteristics of the soft X-ray are found to depend on the flare position. It is suggested that small-scale quasi-static electric fields are important for determining the acceleration of the X-ray-producing electrons and the outflowing chromospheric ions.
Document ID
19910057585
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Winglee, R. M.
(Southwest Research Institute San Antonio, TX, United States)
Kiplinger, A. L.
(Colorado, University; NOAA, Space Environment Laboratory, Boulder, United States)
Zarro, D. M.
(NASA Goddard Space Flight Center Greenbelt; Applied Research Corp., Landover, MD; Lockheed Palo Alto Research Laboratories, CA, United States)
Dulk, G. A.
(Colorado, University Boulder, United States)
Lemen, J. R.
(Lockheed Palo Alto Research Laboratories CA, United States)
Date Acquired
August 15, 2013
Publication Date
July 1, 1991
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 375
ISSN: 0004-637X
Subject Category
Solar Physics
Accession Number
91A42208
Funding Number(s)
CONTRACT_GRANT: NAS5-30431
CONTRACT_GRANT: NAGW-1462
CONTRACT_GRANT: NSG-7287
CONTRACT_GRANT: NSF ATM-87-19371
CONTRACT_GRANT: NAGW-1587
CONTRACT_GRANT: NAGW-1994
CONTRACT_GRANT: NSF ATM-88-14367
Distribution Limits
Public
Copyright
Other

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