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Properties of an impulsive compact solar flare determined from Solar Maximum Mission X-ray measurementsSoft X-ray, hard X-ray magnetogram, and H-alpha data have been analyzed for an impulsive compact solar flare which occurred on May 21, 1985. The derived flare loop dimensions are about 20,000 km length and about 150 km diameter. Measurements of line ratios from the Mg XI ion indicate that the plasma density varied from about 4 x 10 to the 12th/cu cm early in the flare to about 10 to the 12th/cu cm during the flare decay. The initial temperature of this plasma was about 8 x 10 to the 6th K and dropped to about 5 x 10 to the 6th K during the decay phase. The simplest interpretation of the event is one in which the source of the soft X-ray flare emission is confined to a thin loop of very high density.
Document ID
19880062085
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Linford, G. A. (Lockheed Missiles and Space Co. Palo Alto, CA, United States)
Wolfson, C. J. (Lockheed Research Laboratories Palo Alto, CA, United States)
Date Acquired
August 13, 2013
Publication Date
August 15, 1988
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 331
ISSN: 0004-637X
Subject Category
SOLAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NAS5-28713
Distribution Limits
Public
Copyright
Other