Dual Trigger of Transverse Oscillations in a Prominence by EUV Fast and Slow Coronal Waves: SDO/AIA and STEREO/EUVI Observations

Abstract

We analyze flare-associated transverse oscillations in a quiescent solar prominence on 8-9 September, 2010. Both the flaring active region and the prominence were located near the West limb, with a favorable configuration and viewing angle. The fulldisk extreme ultraviolet (EUV) images of the Sun obtained with high spatial and temporal resolution by the Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observatory, show flare-associated lateral oscillations of the prominence sheet. The STEREO-A spacecraft, 81.5 degrees ahead of the Sun-Earth line, provides on-disk view of the flare-associated coronal disturbances. We derive the temporal profile of the lateral displacement of the prominence sheet by using the image cross-correlation technique. The displacement curve was de-trended and the residual oscillatory pattern was derived. We fit these oscillations with a damped cosine function with a variable period and find that the period is increasing. The initial oscillation period (P0) is 28.2 minutes and the damping time (t_D) of 44 minutes. We confirm the presence of fast and slow EUV wave components. Using STEREO-A observations we derive a propagation speed of 250 km/s for the slow EUV wave by applying time-slice technique to the running difference images. We propose that the prominence oscillations are excited by the fast EUV wave while the increase in oscillation period of the prominence is an apparent effect, related to a phase change due to the slow EUV wave acting as a secondary trigger. We discuss implications of the dual trigger effect for coronal prominence seismology and scaling law studies of damping mechanisms.

14 pages, 8 figures, to appear in Astrophysical Journal

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Cited by in corpus (12)

• Advances in Observing Various Coronal EUV Waves in the SDO Era and Their Seismological Applications (Invited Review)
• Large-scale Coronal Propagating Fronts in Solar Eruptions as Observed by the Atmospheric Imaging Assembly on Board the Solar Dynamics Observatory\,--\,An Ensemble Study
• A Chain of Winking (Oscillating) Filaments Triggered by an Invisible Extreme-Ultraviolet Wave
• Simultaneous Transverse Oscillations of a Prominence and a Filament and Longitudinal Oscillation of another Filament Induced by a Single Shock Wave
• Three-dimensional MHD Simulations of Solar Prominence Oscillations in a Magnetic Flux Rope
• A statistical study of transverse oscillations in a quiescent prominence
• GONG Catalog of Solar Filament Oscillations Near Solar Maximum
• Simultaneous transverse and longitudinal oscillations in a quiescent prominence triggered by a coronal jet
• Large-amplitude longitudinal oscillations in a solar filament
• Simultaneous transverse oscillations of a coronal loop and a filament excited by a circular-ribbon flare
• Extreme-Ultraviolet Wave and Accompanying Loop Oscillations
• An MHD Study of Large-Amplitude Oscillations in Solar Filaments