PREDNASAJUCI / LECTURER :

Aneta Wiśniewska

(1) Astronomical Institute, Slovak Academy of Sciences,
059 60 Tatranská Lomnica

NAZOV / TITLE :

Oscillations in Quiescent Solar Prominence

ABSTRAKT / ABSTRACT :

Context. 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 probing to a small central area. We expand this
study by analyzing the entire prominence using a 3D wavelet approach. Additionally, we compare the
oscillations using the Solar Terrestrial Relations Observatory (STEREO)-AHEAD Extreme Ultraviolet Imager
(EUVI) at the 304 Å channel, which also observed this prominence. We also analyze the Solar Orbiter (SO)
Extreme Ultraviolet Imager (EUI)/Full Sun Imager (FSI) 304 Å channel data, which captured the same prominence
from behind, offering a tomographic perspective of the feature.

Aims. This work aims to explore oscillation periods ranging from 3 to 35 minutes across the entire quiescent
prominence and correlate them with the 4- and 15-minute oscillations. The 4-minute oscillations are suggested
to be Alfvénic waves traveling through the corona along the 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.

Methods. Significant oscillation periods were detected using 3D wavelet analysis.