论文标题
在部分电离的非常局部的星际介质中的湍流注射尺度上
On the injection scale of the turbulence in the partially ionized very local interstellar medium
论文作者
论文摘要
在部分电离的星际培养基中，磁流失动力学（MHD）的湍流受到离子中性碰撞阻尼和中性粘性阻尼的约束。通过检查温暖和部分离子化的局部星际培养基中的阻尼效应，我们发现，星际湍流在$ \ sim 261 $ au处被中性粘度降低，并且无法解释Voyager 1和2的湍流磁性波动。离子与中性级别的级联反应是在阻尼效应中生存的。在施加的离子中性解耦条件下，并且观察到的Kolmogorov磁能谱的强湍流条件强，我们发现VLISM中的湍流是亚alfvénic，其最大的注射量表是$ \ sim Sim 194 $ au。
The cascade of magnetohydrodynamic (MHD) turbulence is subject to ion-neutral collisional damping and neutral viscous damping in the partially ionized interstellar medium. By examining the damping effects in the warm and partially ionized local interstellar medium, we find that the interstellar turbulence is damped by neutral viscosity at $\sim 261$ au and cannot account for the turbulent magnetic fluctuations detected by Voyager 1 and 2. The MHD turbulence measured by Voyager in the very local interstellar medium (VLISM) should be locally injected in the regime where ions are decoupled from neutrals for its cascade to survive the damping effects. With the imposed ion-neutral decoupling condition, and the strong turbulence condition for the observed Kolmogorov magnetic energy spectrum, we find that the turbulence in the VLISM is sub-Alfvénic, and its largest possible injection scale is $\sim 194$ au.
