[P-EM11] Frontiers in solar physics

[PEM11-04] Wavelet 3D-Based Method for the Examination of Propagating Waves Inside a Quiescent Prominence

*Aneta Wisniewska¹, Kiyoshi Ichimoto², Julius Koza¹, Gabriel Domingo Muro³, Peter Gömöry¹, Alexander Pietrow⁴, Ioannis Kontogiannis^6,5 (1.Astronomical Institute of Slovak Academy of Sciences, 2.Astronomical Observatory, Graduate School of Science, Kyoto University, Japan, 3.California Institute of Technology, Pasadena, CA 91125, USA, 4. Leibniz-Institute for Astrophysics Potsdam, Germany, 5.ETH-Zurich, Honggerberg campus, HIT building, Zürich, Switzerland, 6.Istituto Ricerche Solari Aldo e Cele Daccò (IRSOL), Locarno, Switzerland)

Keywords:Sun, Helioseismology, Prominences, Wavelet

On September 26, 2022, a quiescent solar prominence was observed using Hα imaging spectroscopy. Data were collected by the Solar Dynamics Doppler Imager (SDDI) on the SMART telescope, capturing full-disk solar images around the Hα core. Recent studies identified 4- and 15-minute oscillations in a quiescent prominence using a narrow slit and a 1D wavelet method, limiting spatial analysis to a small central area. In this study, we expand upon these findings by analyzing the entire prominence using a 3D wavelet approach.

Additionally, we compare the oscillations with observations from the Solar Terrestrial Relations Observatory (STEREO-A) Extreme Ultraviolet Imager (EUVI) at the 304 Å channel, which also captured this prominence. We further analyze data from the Solar Orbiter (SO) Extreme Ultraviolet Imager (EUI)/Full Sun Imager (FSI) at 304 Å, which observed the same prominence from behind, providing a tomographic perspective of the structure.

This work aims to explore oscillation periods ranging from 3 to 35 minutes across the entire quiescent prominence. The 4-minute oscillations are suggested to be Alfvénic waves propagating through the corona along prominence threads, likely excited by an external source rather than resonant waves trapped within the prominence itself. In contrast, the 15-minute oscillations are interpreted as upward-propagating Alfvénic waves within the prominence body. We seek to determine whether the recent interpretation of previous 1D results accurately reflects the propagation direction of these waves. Significant oscillation periods were detected using 3D wavelet analysis.