Large-amplitude oscillations of a quiescent filament excited by an extreme-ultraviolet wave

ABSTRACT In this paper, we carry out multiwavelength observations of simultaneous longitudinal and transverse oscillations of a quiescent filament excited by an extreme ultraviolet (EUV) wave on 2023 February 17. A hot channel eruption generates an X2.3 class flare and a fast coronal mass ejection (CME) in active region NOAA 13229 close to the eastern limb. The CME drives an EUV wave, which propagates westward at a speed of $\sim$459 km s$^{-1}$. After arriving at the filament $\sim$340.3 Mm away from the flare site, the filament is disturbed and starts large-amplitude oscillations, which are mainly observed in 171 Å. The longitudinal oscillations last for nearly two cycles. The average initial amplitude, velocity, period, and damping time are $\sim$4.7 Mm, $\sim$26.5 km s$^{-1}$, $\sim$1099.1 s, and $\sim$2760.3 s, respectively. According to the pendulum model, the curvature radius and minimum horizontal magnetic field strength of the dips are estimated to be 6.7${\!-\!}$9.9 Mm and 4.6${\!-\!}$5.6 G. The transverse oscillations last for 2–3 cycles. The average initial amplitude, velocity, period, and damping time are $\sim$1.8 Mm, $\sim$11.2 km s$^{-1}$, $\sim$994.4 s, and $\sim$3576.2 s, respectively. The radial magnetic field strength of the dips are estimated to be 6.6–7.4 G.