论文标题
背景周期性流对MHD快速波传播到冠状环的影响
Effects of background periodic flow on MHD fast wave propagation to a coronal loop
论文作者
论文摘要
我们通过不均匀的固定流动区域研究了MHD快速波的传播到圆柱形冠状动脉环中。除了恒定速度外，假定背景流具有小的，空间周期性的结构。我们专注于与恒定流动情况相比，在AlfVén共振中的波能吸收。定期流动结构诱导了一种新的流动（吸收）状态，从而增强了反平行流动的吸收和对轴向波矢量的平行流动的吸收（过度反射），这取决于过渡层和流量谱。对于某些流程构型，出现了巨大的过度反射和异常吸收行为。在其他流动方案中，其对吸收的影响被证明是弱的。
We investigate the propagation of MHD fast waves into a cylindrical coronal loop through an inhomogeneous stationary flow region. The background flow is assumed to have a small, spatially periodic structure in addition to a constant speed. We focus on the absorption of the wave energy in Alfvén resonance, comparing with the constant flow case. A new flow (absorption) regime is induced by the periodic flow structure which enhances the absorption for the antiparallel flow and inverse absorption (overreflection) for the parallel flow with respect to the axial wave vector, depending on the transitional layer and flow profiles. A giant overreflection and anomalous absorption behavior arise for some flow configurations. In the other flow regimes, its effect on the absorption is shown to be weak.
