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Properties of the termination shock observed by Voyager 2
Li H(李晖); Wang C(王赤); Richardson, J. D.; 北京8701信箱
Department空间天气学国家重点实验室
Source PublicationGeophysical Research Letters
2008
Volume35Issue:19Pages:L19107
ISSN0094-8276
Language英语
KeywordSolar-wind
AbstractIn August 2007, Voyager 2 reached the termination shock and entered the heliosheath at a distance of about 83.6 AU. Due to the variations of the solar wind dynamic pressure or waves on the shock front, the termination shock moved back and forth, and Voyager 2 crossed the termination shock multiple times. We use the best fit solution of the Monte-Carlo method to define the upstream and downstream conditions and determine the properties of termination shock, such as the shock normal, speed, and strength. For the crossings on DOY 243.819243.875 (shock 1) and DOY 243.99-244.012(shock 2), the termination shock moved almost in the radial direction. The shock is nearly perpendicular, and the angle between the shock normal and the solar wind magnetic field is about 70 degrees. In the case of the first crossing, the termination shock moved away from the Sun with a speed of about 100 km s(-1), whereas the termination shock moved toward Sun with a speed of about 30 km s(-1) for the second crossing. The density ratios of the termination shock are 2.2 and 1.6, respectively. For both crossing events, the flow is found to be still supersonic with respect to the thermal ions downstream of the termination shock, probably due to the fact that most of the solar wind energy is transferred to the pickup ions.
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/122/1122
Collection空间科学部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
Li H,Wang C,Richardson, J. D.,et al. Properties of the termination shock observed by Voyager 2[J]. Geophysical Research Letters,2008,35(19):L19107.
APA 李晖,王赤,Richardson, J. D.,&北京8701信箱.(2008).Properties of the termination shock observed by Voyager 2.Geophysical Research Letters,35(19),L19107.
MLA 李晖,et al."Properties of the termination shock observed by Voyager 2".Geophysical Research Letters 35.19(2008):L19107.
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