High time resolution plasma wave and magnetic field observations of the Jovian bow shock
High time resolution plasma wave and magnetic field observations of the Jovian bow shock
复制标题
木星弓形激波的高时间分辨率等离子体波和磁场观测
DOI：
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发表时间：
1985
期刊：
影响因子：
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通讯作者：
R. Lepping
中科院分区：
文献类型：
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作者：
S. Moses;F. Coroniti;C. Kennel;F. Scarf;E. Greenstadt;W. Kurth;R. Lepping
高时间分辨率(60ms)的Voyager磁强计和等离子体波测量表明，在激波前缘，强(快马赫数为16)准垂直木弓激波的等离子体波谱发生了突变。上游的电子等离子体波在前沿终止，并被类似于离子声波的较低频率的宽带谱所取代，该谱终止于主激波斜坡。与低频分量足部区域的明显关联表明，它是由反射离子产生的。如果上游等离子体波是由逃逸的电子热流产生的，它们在前沿的终止表明电子是由激波脚中的低频波加热的。
High time resolution (60 ms) Voyager magnetometer and plasma wave measurements of a strong (fast Mach number 16), quasi-perpendicular Jovian bow shock reveal an abrupt change in the plasma wave spectrum at the leading edge of the shock foot. Upstream electron plasma waves terminate at the leading edge, and are replaced by a lower-frequency broadband spectrum of ion-acoustic-like waves, which terminates at the main shock ramp. The clear association with the foot region of the lower frequency component suggests that it is generated by reflected ions. If the upstream plasma waves are generated by an escaping electron heat flux, their termination at the leading edge suggests that electrons are heated by the low-frequency waves in the shock foot.