论文标题
由磁重新连接驱动的亚离子尺度湍流
Subion Scale Turbulence Driven by Magnetic Reconnection
论文作者
论文摘要
在天体物理和实验室等离子体中，等离子体湍流与磁重新连接之间的相互作用仍然是一个尚未解决的问题。在这里，我们报告了第一个观察性的证据，即磁重新连接通过将能量转移到小尺度来驱动磁层等离子体中的亚尺度湍流。我们采用了Hall Magnetodrodnymics的空间粗粒模型，使我们能够在位置$ x $的位置$ \ ell $上测量非线性能量传输速率。它在磁层多尺度任务数据中的应用表明，磁重新连接将巨大的能量转移到亚尺度上。这一观察性证据得到了杂种vlasov-Maxwell模拟的湍流模拟的结果，也将其应用于该模型。这些结果可能会回答有关行星环境中血浆湍流的一些开放问题。
The interplay between plasma turbulence and magnetic reconnection remains an unsettled question in astrophysical and laboratory plasmas. Here we report the first observational evidence that magnetic reconnection drives subion scale turbulence in magnetospheric plasmas by transferring energy to small scales. We employ a spatial coarse-grained model of Hall magnetohydrodynamics, enabling us to measure the nonlinear energy transfer rate across scale $\ell$ at position $x$. Its application to Magnetospheric Multiscale mission data shows that magnetic reconnection drives intense energy transfer to subion scales. This observational evidence is remarkably supported by the results from Hybrid Vlasov-Maxwell simulations of turbulence to which the coarse-grained model is also applied. These results can potentially answer some open questions on plasma turbulence in planetary environments.
