基于多点观测的太阳暗条三维演化
Three-dimensional evolution of a solar filament with multipoint observations
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中文总结 AI 辅助
该研究基于特定几何模型，利用多视角多波长观测对太阳暗条爆发进行三维重建与跟踪，获取其形态、方向、速度等信息，评估了CME前沿速度，为太阳暗条及相关现象研究提供了新数据和方法。
中文摘要 AI 辅助
本文首先基于3DCORE模型形状设计了一个几何模型，该模型以环形通量绳为特征，环的整体形状是椭圆，横截面沿环为圆形，考虑了偏转和倾斜。利用从地球、Ahead-STEREO（STA）和太阳轨道器角度的多波长观测，将该模型应用于2024年10月8日与耀斑和日冕物质抛射（CME）相关的暗条爆发的三维重建和跟踪，获得了爆发暗条的形态、方向和真实速度（约433 km/s），发现暗条非径向传播，向东偏转约10度，向南显著偏转约40度，轨迹显示其向STA移动，通过三维重建相互验证了成像和光谱观测的暗条真实方向，暗条日心距离在35分钟内从约1.68增加到约2.94太阳半径，基于三维重建结果评估CME前沿真实速度为1046 - 1145 km/s。
英文摘要
In this paper, we first devise a geometrical model, featuring a torus-like flux rope based on the shape of 3DCORE model. The global shape of the torus is an ellipse, while the cross sections are circular along the torus. The thinnest point is located between the Sun center and photosphere. Deflections and inclination are considered as well. Using multiwavelength observations from perspectives of Earth, Ahead-STEREO (STA), and Solar Orbiter, we apply the model to three-dimensional (3D) reconstructions and tracking of the filament eruption, which was associated with a flare and a coronal mass ejection (CME) on 2024 October 8. The morphology, direction, and true velocity ($\sim$433 km/s) of the eruptive filament are obtained. It is found that the filament propagates nonradially, deflecting slightly eastward by $\sim$10 degrees and significantly southward by $\sim$40 degrees. Trajectory of the filament in the ecliptic plane reveals that the filament moves toward STA. The true direction of the eruptive filament using imaging and spectral observations is mutually verified by 3D reconstructions. The heliocentric distance of the filament increases from $\sim$1.68 to $\sim$2.94 solar radii within 35 minutes. Based on the results of 3D reconstructions, the true speed of the CME leading edge is evaluated to be 1046$-$1145 km/s.
