Dissipation range dynamics: Kinetic Alfvn waves and the importance of
Dissipation range dynamics: Kinetic Alfvn waves and the importance of
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DOI：
10.1029/1999ja900158
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发表时间：
1999-10
影响因子：
--
通讯作者：
R. Leamon;Charles W. Smith;N. Ness;H. Wong
中科院分区：
文献类型：
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作者：
R. Leamon;Charles W. Smith;N. Ness;H. Wong
在以前的论文中，我们认为，阻尼斜传播的动力阿尔芬波，主要是由共振机制，是一个可能的解释形成的耗散范围行星际磁场波动。这一建议主要是基于风号航天器记录的1 Au处耗散范围的观测结果。我们追求这一建议在这里与一般检查的阻尼斜传播的动力阿尔芬波和额外的检查的意见。我们探讨了阻尼率的动力学Alfven波在广泛的行星际条件下使用数值解的线性麦克斯韦-弗拉索夫方程，并证明这些波显示从以前的文件推断的近各向同性耗散属性。使用这些解决方案，我们提出了一个简单的模型来预测的耗散范围的发病，并比较这些预测的观察。在这个过程中，我们证明了电子朗道阻尼起着重要的作用，行星际磁场的波动，导致显着加热的热电子的阻尼。
In a previous paper we argued that the damping of obliquely propagating kinetic Alfven waves, chiefly by resonant mechanisms, was a likely explanation for the formation of the dissipation range for interplanetary magnetic field fluctuations. This suggestion was based largely on observations of the dissipation range at 1 AU as recorded by the Wind spacecraft. We pursue this suggestion here with both a general examination of the damping of obliquely propagating kinetic Alfven waves and an additional examination of the observations. We explore the damping rates of kinetic Alfven waves under a wide range of interplanetary conditions using numerical solutions of the linearized Maxwell-Vlasov equations and demonstrate that these waves display the nearly isotropic dissipation properties inferred from the previous paper. Using these solutions, we present a simple model to predict the onset of the dissipation range and compare these predictions to the observations. In the process we demonstrate that electron Landau damping plays a significant role in the damping of interplanetary magnetic field fluctuations which leads to significant heating of the thermal electrons.