论文标题
关于内heliosheath中可压缩的镜模波的产生
On the Generation of Compressible Mirror-mode Fluctuations in the Inner Heliosheath
论文作者
论文摘要
使用Voyager 1航天器进行的测量表明，内heliosheath中存在显着的压缩波动。一些研究已经在接近太阳风终止冲击的下游区域的镜模不稳定性方面进行，在这里我们将研究扩展到整个内部螺旋壳。我们采用准线性理论，并由地层的全球磁性水力动力学模型造成，以计算温度各向异性的时间演变和相应的磁波的能量密度，我们证明了它们的可能存在于内部heliosheath中。此外，我们计算相关的局部生成的密度波动。结果可以用作内部螺旋壳中可压缩湍流的未来模型的输入。
Measurements made with the Voyager 1 spacecraft indicate that significant levels of compressive fluctuations exist in the inner heliosheath. Some studies have already been performed with respect to the mirror-mode instability in the downstream region close to the solar wind termination shock, and here we extend the investigation to the whole inner heliosheath. We employ quasilinear theory and results from a global magnetohydrodynamic model of the heliosphere to compute the time evolution of both the temperature anisotropy and the energy density of the corresponding magnetic fluctuations, and we demonstrate their likely presence in the inner heliosheath. Furthermore, we compute the associated, locally generated density fluctuations. The results can serve as inputs for future models of the transport of compressible turbulence in the inner heliosheath.
