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Characteristics of hard X-ray double sources in impulsive solar flaresImaging observations of solar flare hard X-ray sources with the Hard X-ray Telescope (HXT) aboard the Yohkoh satellite have revealed that hard X-ray emissions (greater than 30 ke V) originate most frequently from double sources. The double sources are located on both sides of the magnetic neutral line, suggesting that the bulk of hard X-rays is emitted from footpoints of flaring magnetic loops. We also found that hard X-rays from the double sources are emitted simultaneously within a fraction of second and that the weaker source tends to be located in the stronger magnetic field region, showing a softer spectrum. Physcial implications on the observed characteristics of the hard X-ray double sources are discussed.
Document ID
19950064131
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sakao, T.
(National Astronomical Observatory Tokyo, Japan)
Kosugi, T.
(National Astronomical Observatory Tokyo, Japan)
Masuda, S.
(Nagoya Univ. Aichi, Japan)
Yaji, K.
(National Astronomical Observatory Tokyo, Japan)
Inda-Koide, M.
(Toyama Univ. Toyama, Japan)
Makishima, K.
(Univ. of Tokyo Tokyo, Japan)
Date Acquired
August 17, 2013
Publication Date
January 1, 1996
Publication Information
Publication: Advances in Space Research
Volume: 17
Issue: 4-5
ISSN: 0273-1177
Subject Category
Solar Physics
Accession Number
95A95730
Distribution Limits
Public
Copyright
Other

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