Speaker
Description
Context: On 26 September 2022, a quiescent solar prominence was observed using Hα imaging spectroscopy with the Solar Dynamics
Doppler Imager on the Solar Magnetic Activity Research Telescope. Prior studies identified 4- and 15-min oscillations using a narrow
slit and 1D wavelet methods, limiting spatial coverage. We extend this analysis to the entire prominence using a 3D wavelet approach
and compare the results with observations from the Solar Dynamics Observatory/ Atmospheric Imaging Assembly at 304 Å 171 Å
and Solar Terrestrial Relations Observatory - Ahead Extreme Ultraviolet Imager at 304 Å and Solar Orbiter Extreme Ultraviolet
Imager/Full Sun Imager at 304 Å and 174 Å, offering a tomographic perspective.
Aims: Our aim is to examine the distribution of oscillatory power in the range from 3 min to 64 min in plasma of different temperatures,
probed from different vantage points, to draw conclusions on wave propagation across the prominence.
Methods: We analyze a set of observations that offered a tomographic perspective of the prominence. Namely, time series of obser-
vations from the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory, the Extreme Ultraviolet Imager onboard
Solar Terrestrial Relations Observatory - Ahead, the Extreme Ultraviolet Imager onboard the Solar Orbiter, as well as ground-based
Solar Magnetic Activity Research Telescope/Solar Dynamics Doppler Imager Hα observations Doppler velocities and EUV intensities
at 304 Å and 174 Å.
Results: Our analysis confirms the presence of persistent propagating waves in a quiescent prominence, with oscillatory periods
ranging from 4 min to 64 min. Significant oscillation periods are found in both: neutral plasma probed by Hα, and in the 304 Å
passband, primarily in the prominence’s central region. Weak 4-min oscillations and rapid 30-s transversal waves appear in Doppler
signal near the solar surface.
Conclusions: The observed vertical plasma motions, kink waves, and intermittent short-period oscillations suggest a complex inter-
play between internal prominence dynamics and external triggers, and a potential link to photospheric 5-min oscillations
| Do you plan to attend in-person or online? | In-person |
|---|
