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Acceleration of runaway electrons and Joule heating in solar flaresThe electric field acceleration of electrons out of a thermal plasma and the simultaneous Joule heating of the plasma are studied. Acceleration and heating timescales are derived and compared, and upper limits are obtained on the acceleration volume and the rate at which electrons can be accelerated. These upper limits, determined by the maximum magnetic field strength observed in flaring regions, place stringent restrictions upon the acceleration process. The role of the plasma resistivity in these processes is examined, and possible sources of anomalous resistivity are summarized. The implications of these results for the microwave and hard X-ray emission from solar flares are examined.
Document ID
19850056896
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Holman, G. D. (NASA Goddard Space Flight Center Laboratory for Astronomy and Solar Physics, Greenbelt, MD, United States)
Date Acquired
August 12, 2013
Publication Date
June 15, 1985
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 293
ISSN: 0004-637X
Subject Category
SOLAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NGR-21-002-199
CONTRACT_GRANT: NGL-21-002-033
CONTRACT_GRANT: NSF ATM-81-03809
CONTRACT_GRANT: NSG-5320
Distribution Limits
Public
Copyright
Other