运动导体的等离子体波和射流
Plasma Waves and Jets from Moving Conductors
摘要：
我们考虑由导电材料运动通过磁场而发射的无力等离子体波。我们开发了一个时空协变的形式主义的扰动的均匀磁场，并显示如何作为一个源的导电流体的横向运动。我们发现，快模式波的来源是由流体的可压缩性，不可压缩流体推出一个纯阿尔文外流。值得注意的是，对于任意时间相关的非轴对称不可压缩流，这种外流可以写成封闭形式。瞬时流速被印在磁场上，并以光速传输出去，携带着发射时传导源的详细信息。这些结果可以应用于脉冲星外流的瞬态和喷流从中子星在另一个紧凑的物体的磁层轨道。我们将详细讨论运动导体的射流。
英文摘要：
We consider force-free plasma waves launched by the motion of conducting material through a magnetic field. We develop a spacetime-covariant formalism for perturbations of a uniform magnetic field and show how the transverse motion of a conducting fluid acts as a source. We show that fast-mode waves are sourced by the compressibility of the fluid, with incompressible fluids launching a pure-Alfvén outflow. Remarkably, this outflow can be written down in closed form for an arbitrary time-dependent, nonaxisymmetric incompressible flow. The instantaneous flow velocity is imprinted on the magnetic field and transmitted away at the speed of light, carrying detailed information about the conducting source at the time of emission. These results can be applied to transients in pulsar outflows and to jets from neutron stars orbiting in the magnetosphere of another compact object. We discuss jets from moving conductors in some detail.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
