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Heavy ion acceleration in impulsive solar flares
Wang, DY
AbstractThe abundance enhancements of heavy ions Ne, Mg, Si and Fe in impulsive solar energetic particle (SEP) events are explained by a plasma acceleration mechanism. In consideration of the fact that the coronal plasma is mainly composed of hydrogen and helium ions, we think that the ion-ion hybrid wave and quasi-perpendicular wave can be excited by the energetic electron beam in impulsive solar Bares. These waves may resonantly be absorbed by heavy ions when the frequencies of these waves are close to the second-harmonic gyrofrequencies of these heavy ions. This requires the coronal plasma temperature to be located in the range of T similar to (5 - 9) x 10(6) K in impulsive solar fares and makes the average,onic charge state of these heavy ions in impulsive SEP events higher than the average ionic charge state of these heavy ions in gradual SEP events. These pre-heated and enhanced heavy ions can successively and stochastically be accelerated by Alfven turbulence and then form a power-law distribution in impulsive SEP events.
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaPhysics
WOS SubjectPhysics, Multidisciplinary
WOS IDWOS:000177137900046
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
Recommended Citation
GB/T 7714
Wang, DY. Heavy ion acceleration in impulsive solar flares[J]. CHINESE PHYSICS LETTERS,2002,19(7):1027-1030.
APA Wang, DY.(2002).Heavy ion acceleration in impulsive solar flares.CHINESE PHYSICS LETTERS,19(7),1027-1030.
MLA Wang, DY."Heavy ion acceleration in impulsive solar flares".CHINESE PHYSICS LETTERS 19.7(2002):1027-1030.
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