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Thick-target bremsstrahlung interpretation of short time-scale solar hard X-ray featuresSteady-state analyses of bremsstrahlung hard X-ray production in solar flares are appropriate only if the lifetime of the high energy electrons in the X-ray source is much shorter than the duration of the observed X-ray burst. For a thick-target nonthermal model, this implies that a full time-dependent analysis is required when the duration of the burst is comparable to the collisional lifetime of the injected electrons, in turn set by the lengths and densities of the flaring region. In this paper we present the results of such a time-dependent analysis, and we point out that the intrinsic temporal signature of the thick-target production mechanism, caused by the finite travel time of the electrons through the target, may indeed rule out such a mechanism for extremely short duration hard X-ray events.
Document ID
19830061243
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Emslie, A. G.
(Alabama, University Huntsville, AL, United States)
Date Acquired
August 11, 2013
Publication Date
August 1, 1983
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 271
ISSN: 0004-637X
Subject Category
Solar Physics
Accession Number
83A42461
Funding Number(s)
CONTRACT_GRANT: NAGW-294
CONTRACT_GRANT: NSF ATM-82-00934
Distribution Limits
Public
Copyright
Other

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