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Dipolarization fronts as a consequence of transient reconnection: In situ evidence
Fu, H. S.; Cao, J. B.; Khotyaintsev, Yu. V.; Sitnov, M. I.; Runov, A.; Fu, S. Y.; Hamrin, M.; Andre, M.; Retino, A.; Ma, Y. D.; Lu, H. Y.; Wei, X. H.; Huang, S. Y.; Fu, HS (reprint author), Beihang Univ, Sch Astronaut, Space Sci Inst, 37 Xueyuan Rd, Beijing 100191, Peoples R China.
Department空间科学部
Source PublicationGEOPHYSICAL RESEARCH LETTERS
2013
Volume40Issue:23Pages:6023-6027
ISSN0094-8276
Language英语
KeywordDipolarization Front Unsteady Reconnection Ion diffusIon regIon High-speed Flow Jet Braking Spontaneous Formation
AbstractDipolarization fronts (DFs) are frequently detected in the Earth's magnetotail from X-GSM=-30 R-E to X-GSM=-7 R-E. How these DFs are formed is still poorly understood. Three possible mechanisms have been suggested in previous simulations: (1) jet braking, (2) transient reconnection, and (3) spontaneous formation. Among these three mechanisms, the first has been verified by using spacecraft observation, while the second and third have not. In this study, we show Cluster observation of DFs inside reconnection diffusion region. This observation provides in situ evidence of the second mechanism: Transient reconnection can produce DFs. We suggest that the DFs detected in the near-Earth region (X-GSM>-10 R-E) are primarily attributed to jet braking, while the DFs detected in the mid- or far-tail region (X-GSM<-15 R-E) are primarily attributed to transient reconnection or spontaneous formation. In the jet-braking mechanism, the high-speed flow pushes the preexisting plasmas to produce the DF so that there is causality between high-speed flow and DF. In the transient-reconnection mechanism, there is no causality between high-speed flow and DF, because the frozen-in condition is violated.
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/4974
Collection空间科学部
Corresponding AuthorFu, HS (reprint author), Beihang Univ, Sch Astronaut, Space Sci Inst, 37 Xueyuan Rd, Beijing 100191, Peoples R China.
Recommended Citation
GB/T 7714
Fu, H. S.,Cao, J. B.,Khotyaintsev, Yu. V.,et al. Dipolarization fronts as a consequence of transient reconnection: In situ evidence[J]. GEOPHYSICAL RESEARCH LETTERS,2013,40(23):6023-6027.
APA Fu, H. S..,Cao, J. B..,Khotyaintsev, Yu. V..,Sitnov, M. I..,Runov, A..,...&Fu, HS .(2013).Dipolarization fronts as a consequence of transient reconnection: In situ evidence.GEOPHYSICAL RESEARCH LETTERS,40(23),6023-6027.
MLA Fu, H. S.,et al."Dipolarization fronts as a consequence of transient reconnection: In situ evidence".GEOPHYSICAL RESEARCH LETTERS 40.23(2013):6023-6027.
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