论文标题
从现实的3D MHD模拟中合成的H $α$线轮廓中的快速蓝色和红移游览
Rapid Blue- and Red-shifted Excursions in H$α$ line profiles synthesized from realistic 3D MHD simulations
论文作者
论文摘要
快速的蓝色和红移事件（RBES/RRES）可能在质量加载和加热太阳能电晕中起重要作用，但它们的性质和起源仍然值得商bat。我们的目标是建模这些功能，以更多地了解其特性，形成和起源。创建了太阳板区域的现实三维（3D）磁性磁动力（MHD）模型。生成合成H $α$光谱，并确定这些特征的光谱特征。与这些事件相关的磁场线被追踪，并研究了基础动态。该模型重现了RBE和RRE的许多特性，例如空间分布，横向运动，长度和寿命。合成H $α$线曲线（类似于观察到的）表现出强烈的蓝色或红移和不对称性。这些线轮廓是由速度的垂直成分引起的，大小超过$ 30-40 $ km/s，大部分出现在$ 2-4 $毫米的高度范围内。通过追踪磁场线，我们表明导致RBE/RRE的外观出现的垂直速度始终与垂直于磁场线的速度的成分相关。该研究证实了RBE和RRES是Alfv {é} NIC波的迹象的假设，在某些情况下是慢速磁性声学模式的显着贡献。
Rapid blue- and red-shifted events (RBEs/RREs) may have an important role in mass-loading and heating the solar corona, but their nature and origin are still debatable. We aim to model these features to learn more about their properties, formation and origin. A realistic three-dimensional (3D) magneto-hydrodynamic (MHD) model of a solar plage region is created. Synthetic H$α$ spectra are generated and the spectral signatures of these features are identified. The magnetic field lines associated with these events are traced and the underlying dynamic is studied. The model reproduces well many properties of RBEs and RREs, such as spatial distribution, lateral movement, length and lifetimes. Synthetic H$α$ line profiles, similarly to observed ones, show strong blue- or red-shift and asymmetries. These line profiles are caused by the vertical component of velocity with magnitudes larger than $30-40$ km/s that appear mostly in the height range of $2-4$ Mm. By tracing magnetic field lines, we show that the vertical velocity that causes the appearance of RBE/RREs to appear is always associated with the component of velocity perpendicular to the magnetic field line. The study confirms the hypothesis that RBEs and RREs are signs of Alfv{é}nic waves with, in some cases, a significant contribution from slow magneto-acoustic mode.
