Three-dimensional Propagation of the Global EUV Wave associated with a solar eruption on 2021 October 28

• Published in: arXiv.org 2022-02
• Main Authors: Hou, Zhenyong, Tian, Hui, Jing-Song, Wang, Zhang, Xiaoxin, Song, Qiao, Zheng, Ruisheng, Chen, Hechao, Chen, Bo, Bai, Xianyong, Chen, Yajie, He, Lingping, Song, Kefei, Zhang, Peng, Hu, Xiuqing, Dun, Jinping, Zong, Weiguo, Song, Yongliang, Xu, Yu, Tan, Guangyu
• Format: Article
• Language: English
• Subjects: Chromosphere; Coronal mass ejection; Deceleration; Fluid flow; Magnetohydrodynamic waves; Magnetohydrodynamics; Propagation velocity; Solar corona; Solar cycle; Solar surface; Wave fronts; Wave propagation
• ISSN: 2331-8422
• DOI: 10.48550/arxiv.2202.13051

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\(\alpha\) 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\(\alpha\) 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.