旋转热粘性物体中的可压缩流动不稳定性
Compressible streaming instabilities in rotating thermal viscous objects
摘要：
我们研究旋转天体热粘性区的电磁流不稳定性，如原恒星和原行星磁化吸积盘，分子云，它们的核心，和象鼻。所得到的结果也可以应用于任何区域的星际介质，在那里的带电物种之间的不同的平衡速度可以出现。本文研究了由中性粒子、磁化电子和磁化离子组成的弱电离和高电离三分量等离子体。研究了沿背景磁场的垂直扰动。考虑了粒子密度扰动对碰撞频率的影响。在热压力大于磁压力的介质波数谱的宽范围内，微扰的增长率被发现。结果表明，在中性粒子与离子的强碰撞耦合的情况下，粘性的贡献可以忽略不计。
英文摘要：
We study electromagnetic streaming instabilities in thermal viscous regions of rotating astrophysical objects, such as, protostellar and protoplanetary magnetized accretion disks, molecular clouds, their cores, and elephant trunks. The obtained results can also be applied to any regions of interstellar medium, where different equilibrium velocities between charged species can arise. We consider a weakly and highly ionized three-component plasma consisting of neutrals and magnetized electrons and ions. The vertical perturbations along the background magnetic field are investigated. The effect of perturbation of collisional frequencies due to density perturbations of species is taken into account. The growth rates of perturbations are found in a wide region of wave number spectrum for media, where the thermal pressure is larger than the magnetic pressure. It is shown that in cases of strong collisional coupling of neutrals with ions the contribution of the viscosity is negligible.
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