论文标题
1021年10月28日与太阳喷发相关的全球EUV波的三维传播
Three-dimensional Propagation of the Global EUV Wave associated with a solar eruption on 2021 October 28
论文作者
论文摘要
我们提出了一项针对与太阳周期中第二X级耀斑相关的全局极端紫外线（EUV）波及其色层对应物的“ Moreton-Ramsey Wave”和Halo Coronal质量喷射（CME）。在H $α$和具有不同特征温度的EUV通带中观察到EUV波。在171Å和193/195Å的图像中，波浪以600-720 km s $^{ - 1} $的初始速度循环传播，并减速为110-320 M S $^{ - 2} $。在波前通过时，将局部冠状血浆从log（t/k）= 5.9加热到log（t/k）= 6.2。 H $α$和304Å的图像还揭示了波传播的签名，速度为310-540 km s $^{ - 1} $。通过多波长和双重观测，我们发现波前很可能以〜53.2 $^{\ circ} $倾斜的角度向前传播到太阳表面。我们的结果表明，该EUV波是由相关CME的扩展驱动的快速磁性水力动力波或冲击，其波前很可能是圆顶形状的结构，可能会影响上铬球，过渡区域和电晕。
We present a case study for the global extreme ultraviolet (EUV) wave and its chromospheric counterpart `Moreton-Ramsey wave' associated with the second X-class flare in Solar Cycle 25 and a halo coronal mass ejection (CME). The EUV wave was observed in the H$α$ and EUV passbands with different characteristic temperatures. In the 171 Å and 193/195 Å images, the wave propagates circularly with an initial velocity of 600-720 km s$^{-1}$ and a deceleration of 110-320 m s$^{-2}$. The local coronal plasma is heated from log(T/K)=5.9 to log(T/K)=6.2 during the passage of the wavefront. The H$α$ and 304 Å images also reveal signatures of wave propagation with a velocity of 310-540 km s$^{-1}$. With multi-wavelength and dual-perspective observations, we found that the wavefront likely propagates forwardly inclined to the solar surface with a tilt angle of ~53.2$^{\circ}$. Our results suggest that this EUV wave is a fast-mode magnetohydrodynamic wave or shock driven by the expansion of the associated CME, whose wavefront is likely a dome-shaped structure that could impact the upper chromosphere, transition region and corona.
