论文标题
嵌入不对称磁环境中的太阳冠状平板中的斜准晶体模式：谐振阻尼，相位图和组图
Oblique Quasi-Kink Modes in Solar Coronal Slabs Embedded in an Asymmetric Magnetic Environment: Resonant Damping, Phase and Group Diagrams
论文作者
论文摘要
在静态，直，野外一致的一维平衡中，对磁性波的兴趣很大，其中磁板的外部在两侧之间有所不同。我们专注于无压力设置中的陷阱，横向基本的准键模式，其中密度从均匀的内部（具有密度$ρ_{\ rm I} $）连续变化到任一侧的均匀外部（带有密度$ρ_{\ rm l} $或$ $ρ________ { $ρ_ {\ rm l} \leρ_ {\ rm r} \leρ_{\ rm i} $。连续的结构和倾斜的传播使我们的研究相对于相关研究，并通过alfv $ \急性{\ rm e} $ n共振导致波浪阻尼。我们通过改变$ρ_ {\ rm I}/ρ_{\ rm rm rm rm r} $从`完全对称的'（$ρ_{$ρ_{\ rm i}/p f and''（\ rm i i}/p \ c，通过改变$ρ_ {\ rm i}/ρ_{\ rm i}/ρ_{ r} =ρ_ {\ rm i}/ρ_ {\ rm l} $）to``fluse''limition'''''''我们发现，阻尼率具有非单调的$ρ_ {\ rm i}/ρ_{\ rm rm rm r} $ - 由于两个alfv $ \急性{\ rm e} $ n continua之间的差异，因此仅在$ peconuum中才会出现$ρ__{ i}/ρ_ {\ rm r} $低于某个阈值。我们还发现，该系统不对称会导致两个定性不同的阶段和组图制度。相对于平衡磁场，相对于``完全不对称的''（``完全对称''）一个。我们的数值结果是通过在薄边界极限中取得分析进度来理解的，并讨论了轴向站立模式和冲动激发的波兰的成像观察。
There has been considerable interest in magnetoacoustic waves in static, straight, field-aligned, one-dimensional equilibria where the exteriors of a magnetic slab are different between the two sides. We focus on trapped, transverse fundamental, oblique quasi-kink modes in pressureless setups where the density varies continuously from a uniform interior (with density $ρ_{\rm i}$) to a uniform exterior on either side (with density $ρ_{\rm L}$ or $ρ_{\rm R}$), assuming $ρ_{\rm L}\leρ_{\rm R}\leρ_{\rm i}$. The continuous structuring and oblique propagation make our study new relative to pertinent studies, and lead to wave damping via the Alfv$\acute{\rm e}$n resonance. We compute resonantly damped quasi-kink modes as resistive eigenmodes, and isolate the effects of system asymmetry by varying $ρ_{\rm i}/ρ_{\rm R}$ from the ``Fully Symmetric'' ($ρ_{\rm i}/ρ_{\rm R}=ρ_{\rm i}/ρ_{\rm L}$) to the ``Fully Asymmetric'' limit ($ρ_{\rm i}/ρ_{\rm R}=1$). We find that the damping rates possess a nonmonotonic $ρ_{\rm i}/ρ_{\rm R}$-dependence as a result of the difference between the two Alfv$\acute{\rm e}$n continua, and resonant absorption occurs only in one continuum when $ρ_{\rm i}/ρ_{\rm R}$ is below some threshold. We also find that the system asymmetry results in two qualitatively different regimes for the phase and group diagrams. The phase and group trajectories lie essentially on the same side (different sides) relative to the equilibrium magnetic field when the configuration is not far from a ``Fully Asymmetric'' (``Fully Symmetric'') one. Our numerical results are understood by making analytical progress in the thin-boundary limit, and discussed for imaging observations of axial standing modes and impulsively excited wavetrains.
