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.

中文翻译：

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内日鞘中可压缩镜模脉动的产生

使用航海者 1 号航天器进行的测量表明，内部日鞘中存在显着的压缩波动。已经对靠近太阳风终止激波的下游区域的镜像模式不稳定性进行了一些研究，在这里我们将研究扩展到整个内日鞘。我们采用拟线性理论和日球层全球磁流体动力学模型的结果来计算温度各向异性和相应磁涨落的能量密度的时间演变，并证明它们可能存在于内部日鞘中。此外，我们计算相关的、局部产生的密度波动。