Evidence for Langmuir oscillations and a low density cavity in the Venus magnetotail
Evidence for Langmuir oscillations and a low density cavity in the Venus magnetotail
复制标题
金星磁尾中朗缪尔振荡和低密度空腔的证据
DOI：
10.1029/93gl03379
复制
发表时间：
1993
影响因子：
5.2
通讯作者：
C. Russell
中科院分区：
文献类型：
--
作者：
C. Ho;R. Strangeway;C. Russell
我们报告发现朗缪尔振荡在一个非常低的等离子体密度区域的金星磁尾。这些波在30 kHz时更常见，但在5.4 kHz时也可以观察到，这表明中央尾叶的密度低至0.3 cm−3。先锋金星轨道器上的朗缪尔探测器无法分辨如此低的等离子体密度。我们使用磁场强度和总压平衡的假设来推断电子温度作为朗缪尔波解释的测试。通过研究这种波活动的空间分布，我们发现，等离子体腔是有序的行星际磁场定义的坐标系中，并发现在中央尾电流片的两侧。
We report the discovery of Langmuir oscillations in a very low plasma density region in the Venus magnetotail. These waves are observed more often at 30 kHz, but also at 5.4 kHz indicating densities as low as 0.3 cm−3 in the central tail lobe. The Langmuir probe on board the Pioneer Venus Orbiter cannot resolve such a low plasma density. We use the magnetic field strength and the assumption of total pressure balance to infer the electron temperature as a test of the Langmuir wave interpretation. By investigating the spatial distribution of this wave activity we find that the plasma cavity is ordered in a coordinate system defined by the interplanetary magnetic field and is found at either side of the central tail current sheet.