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Observed dispersive properties of the slow magnetoacoustic waves propagating in coronal fan loops above sunspots

Zhao, Junwei; Chen, Ruizhu; Wang, Tongjiang

Recurrent and propagating intensity perturbations are frequently observed in extreme ultraviolet (EUV) channels along coronal fan loops above sunspots, and these perturbations are suggested to be slow magnetoacoustic waves. Numerous studies have been conducted to investigate their propagation speeds, damping, and excitation sources; however, there…