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Observations of an interplanetary slow shock associated with magnetic cloud boundary layer
Zuo, P. B.; Wei, F. S.; Feng, X. S.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationGeophysical Research Letters
2006
Volume33Issue:15Pages:L15107
ISSN0094-8276
Language英语
KeywordSolar-wind Plasma Field Reconnection Spacecraft Reverse Au
AbstractThe observations of the slow shocks associated with the interplanetary coronal mass ejections near 1 AU have seldom been reported in the past several decades. In this paper we report the identification of an interplanetary slow shock observed by Wind on September 18, 1997. This slow shock is found to be just the front boundary of a magnetic cloud boundary layer. A self-consistent method based on the entire R-H relations is introduced to determine the shock normal. It is found that the observations of the jump conditions across the shock are in good agreement with the R-H solutions. The intermediate Mach number M-I = U-n/(V(A)cos theta(Bn)) is less than 1 on both sides of the shock. In the upstream region, the slow Mach number M-s1 = U-n1/V-s1 is 1.44 ( above unity), and in the downstream region, the slow Mach number M-s2 = U-n2/ V-s2 is 0.8 ( below unity). Here V-s and V-A represent the slow magnetoacoustic speed and Alfven speed respectively. In addition, the typical interior magnetic structure inside the shock layer is also analyzed using the 3s time resolution magnetic field data since the time for the spacecraft traversing the shock layer is much longer ( about 17s). As a potential explanation to the formation of this kind of slow shock associated with magnetic clouds, this slow shock could be a signature of reconnection that probably occurs inside the magnetic cloud boundary layer.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1066
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Zuo, P. B.,Wei, F. S.,Feng, X. S.,et al. Observations of an interplanetary slow shock associated with magnetic cloud boundary layer[J]. Geophysical Research Letters,2006,33(15):L15107.
APA Zuo, P. B.,Wei, F. S.,Feng, X. S.,&北京8701信箱.(2006).Observations of an interplanetary slow shock associated with magnetic cloud boundary layer.Geophysical Research Letters,33(15),L15107.
MLA Zuo, P. B.,et al."Observations of an interplanetary slow shock associated with magnetic cloud boundary layer".Geophysical Research Letters 33.15(2006):L15107.
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