Resolved magnetohydrodynamic wave lensing in the solar corona
| Autor: | Zhou, Xinping, Shen, Yuandeng, Yuan, Ding, Keppens, Rony, Zhao, Xiaozhou, Fu, Libo, Tang, Zehao, Wang, Jiaoyang, Zhou, Chengrui |
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| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Nat Commun 15, 3281 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41467-024-46846-z |
| Popis: | Electromagnetic wave lensing, a common physical phenomenon recognized in visible light for centuries, finds extensive applications in manipulating light in optical systems such as telescopes and cameras. Magnetohydrodynamic wave is a common perturbation phenomenon in the corona. By using high spatio-temporal resolution observations from the Solar Dynamics Observatory, here, we report the observation of a magnetohydrodynamic wave lensing in the highly ionized and magnetized coronal plasma, where quasi-periodic wavefronts emanated from a flare converged at a specific point after traversing a coronal hole. The entire process resembles an electromagnetic wave lensing from the source to the focus. Meanwhile, the magnetohydrodynamic wave lensing is well reproduced through a magnetohydrodynamic numerical simulation with full spatio-temporal resolution. We further investigate potential applications for coronal seismology, as the lensing process encodes information on the Alfv\'en speed, in conjunction with favorable geometric and density variations. Comment: 24 pages, 9 figures, 1 table, published in Nature Communications |
| Databáze: | arXiv |
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