Cross‐Shock Potential in Rippled Versus Planar Quasi‐Perpendicular Shocks Observed by MMS
Cross‐Shock Potential in Rippled Versus Planar Quasi‐Perpendicular Shocks Observed by MMS
复制标题
MMS 观察到的波纹与平面准垂直冲击中的交叉冲击潜力
DOI：
10.1029/2018gl080240
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发表时间：
2019
影响因子：
5.2
通讯作者：
B. Giles
中科院分区：
文献类型：
--
作者：
E. Hanson;O. Agapitov;F. Mozer;V. Krasnoselskikh;S. Bale;L. Avanov;Y. Khotyaintsev;B. Giles
四个磁层多尺度（MMS）航天器前所未有的测量细节使人们能够更深入地研究准垂直无碰撞冲击。我们比较了冲击法线，平面性，和正常的入射框架的交叉冲击电位确定从电场测量和代理，为亚临界行星际冲击和超临界弓冲击。亚临界冲击的交叉冲击电位为26±6 V。冲击尺度为33 km，太短，无法与离子矩的替代品进行比较。来自电子矩的近似值提供了40±5 V的电位估计值。来自磁场最小方差分析的冲击法线几乎相同，表明平面前沿。根据不同航天器的测量，超临界冲击的交叉冲击电位估计为290至440 V，冲击尺度为120 km。反射离子污染了上游的离子基代理，而电子基代理产生了250±50 V的合理估计值。电场最大方差分析的冲击法线不同，表明存在波纹前沿。
The unprecedented detail of measurements by the four Magnetospheric Multiscale (MMS) spacecraft enable deeper investigation of quasi‐perpendicular collisionless shocks. We compare shock normals, planarities, and Normal Incidence Frame cross‐shock potentials determined from electric field measurements and proxies, for a subcritical interplanetary shock and a supercritical bow shock. The subcritical shock's cross‐shock potential was 26±6 V. The shock scale was 33 km, too short to allow comparison with proxies from ion moments. Proxies from electron moments provided potential estimates of 40±5 V. Shock normals from magnetic field minimum variance analysis were nearly identical, indicating a planar front. The supercritical shock's cross‐shock potential was estimated to be from 290 to 440 V from the different spacecraft measurements, with shock scale 120 km. Reflected ions contaminated the ion‐based proxies upstream, whereas electron‐based proxies yielded reasonable estimates of 250±50 V. Shock normals from electric field maximum variance analysis differed, indicating a rippled front.
使用聚类数据估计交叉冲击电势的三种方法的比较
影响因子：
1.9
作者：
Dimmock A
通讯作者：
Dimmock A