论文标题
调和Parker太阳探测观测和磁性水力学理论
Reconciling Parker Solar Probe observations and magnetohydrodynamic theory
论文作者
论文摘要
Parker太阳能调查任务提供了一个独特的机会，可以在不同的中心距离上表征太阳风的几个功能。最近的发现表明，惯性范围的光谱和缩放特性在0.4-0.5 au左右左右时发生过渡。在这里，我们首次提供了如何通过从磁水动力学理论中得出的两种情况来调和这些观察结果对磁和速度场波动的径向演变的调和。观察到的分解是磁场波动的径向演变和血浆热膨胀影响磁性波动和速度波动之间的分布的结果。这两种情况表明，田野之间耦合的不断发展的性质也可以与Kraichnan和Kolmogorov的湍流图片进行调和。我们的发现对湍流研究和建模方法具有重要意义。
The Parker Solar Probe mission provides a unique opportunity to characterize several features of the solar wind at different heliocentric distances. Recent findings have shown a transition in the inertial range spectral and scaling properties around 0.4-0.5 au when moving away from the Sun. Here we provide, for the first time, how to reconcile these observational results on the radial evolution of the magnetic and velocity field fluctuations with two scenarios drawn from the magnetohydrodynamic theory. The observed breakdown is the result of the radial evolution of magnetic field fluctuations and plasma thermal expansion affecting the distribution between magnetic and velocity fluctuations. The two scenarios point towards an evolving nature of the coupling between fields that can be also reconciled with Kraichnan and Kolmogorov pictures of turbulence. Our findings have important implications for turbulence studies and modeling approaches.
