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A study of solar preflare activity using two-dimensional radio and SMM-XRP observationsA study of type III activity at meter-decameter wavelengths in the preflare phase of the February 3, 1986 flare is presented, using data obtained with the Clark Lake Multifrequency Radioheliograph. This activity is compared with similar type III burst activity during the impulsive phase, and it is found that there is a displacement of burst sources between the onset and end times of the activity. A comparison of this displacement at three frequencies suggests that the type III emitting electrons gain access progressively to diverging and different field lines relative to the initial field lines. The energetics of the type III emitting electrons are inferred from observations and compared with those of the associated hard X-ray emitting electrons. The soft X-ray data from SMM-XRP show enhanced emission measure, density, and temperature in the region associated with the preflare type III activity.
Document ID
19880058302
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kundu, M. R. (Maryland Univ. College Park, MD, United States)
Gopalswamy, N. (Maryland, University College Park, United States)
Saba, J. L. R. (Maryland Univ. College Park, MD, United States)
Schmelz, J. T. S. (Applied Research Corp. Landover, MD, United States)
Strong, K. T. (Lockheed Research Laboratory Palo Alto, CA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Solar Physics
Volume: 114
Issue: 2 19
ISSN: 0038-0938
Subject Category
SOLAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS5-28713
CONTRACT_GRANT: NAG5-752
CONTRACT_GRANT: NSF ATM-86-15304
Distribution Limits
Public
Copyright
Other