NAOC Open IR  > 太阳物理研究部
Solar microwave drifting spikes and solitary kinetic alfven waves
Wu, D. J.; Huang, J.; Tang, J. F.; Yan, Y. H.
2007-08-20
Source PublicationASTROPHYSICAL JOURNAL
Volume665Issue:2Pages:L171-L174
AbstractMechanisms driving eruptive phenomena and elementary processes occurring at the smallest coherent scales have been outstanding problems in solar physics. In this Letter, a novel kind of fine structures of solar radio bursts, "solar microwave drifting spikes" (SMDSs), is reported. Our analysis shows that the SMDSs can be produced by a group of "solitary kinetic Alfven waves" (SKAWs) with small cross-field scales, in which the electrons in the SKAWs are accelerated self-consistently by the SKAW electric fields to tens of keV and trapped within the SKAW potential wells. It is these trapped electrons that trigger the SMDSs. And the frequency drifts of the SMDSs are attributed to the SKAW propagation along the magnetic field. The SKAWs are exact solutions of two-fluid equations for a low-beta plasma and have been experimentally verified in the magnetosphere, where they accelerate auroral electrons to several keV. We believe the SMDSs represent a new observational signature of SKAWs in the solar atmosphere.
KeywordPlasmas Sun : Corona Sun : Radio Radiation Waves
Indexed BySCI
Language英语
WOS IDWOS:000248676400022
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7887
Collection太阳物理研究部
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
2.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
3.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Wu, D. J.,Huang, J.,Tang, J. F.,et al. Solar microwave drifting spikes and solitary kinetic alfven waves[J]. ASTROPHYSICAL JOURNAL,2007,665(2):L171-L174.
APA Wu, D. J.,Huang, J.,Tang, J. F.,&Yan, Y. H..(2007).Solar microwave drifting spikes and solitary kinetic alfven waves.ASTROPHYSICAL JOURNAL,665(2),L171-L174.
MLA Wu, D. J.,et al."Solar microwave drifting spikes and solitary kinetic alfven waves".ASTROPHYSICAL JOURNAL 665.2(2007):L171-L174.
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