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Temporal correlations between impulsive ultraviolet and hard X-ray bursts in solar flares observed with high time resolutionThe impulsive phase of solar flares has been simultaneously observed in the ultraviolet O V line, the UV continuum, and hard X-rays with a time resolution of 0.128 s by the SMM satellite. A close time correspondence between the three impulsive components is found, with the best correlation being at the peak of the impulsive phase. Individual bursts or fast features in the O V and the UV continuum are shown to lag behind the corresponding hard X-ray features. None of the considered energy transport mechanisms (thermal conduction, a nonthermal electron beam, electron hole boring, UV radiation, and Alfven waves) are able to consistently account for the observed temporal correlations.
Document ID
19880057171
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Cheng, Chung-Chieh
(U.S. Navy, E. O. Hulburt Center for Space Research, Washington DC, United States)
Vanderveen, K.
(California Institute of Technology Pasadena, CA, United States)
Orwig, L. E.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tandberg-Hanssen, E.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 13, 2013
Publication Date
July 1, 1988
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 330
ISSN: 0004-637X
Subject Category
Solar Physics
Accession Number
88A44398
Distribution Limits
Public
Copyright
Other

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