(IMAGE)
Caption
Signs of resonant absorption are shown. Alfvénic waves propagating in the prominence produce transverse oscillations of the threads. On a graph plotting displacement vs. time, this motion appears as a wavy structure (shown in yellow in the top left panel). The waves resonate and produce a characteristic torsional flow which was observed by IRIS (purple dots in the panel). This flow becomes turbulent and heats the plasma. 3D numerical simulations of an oscillating prominence thread (top-right panel) successfully reproduce this process. The schematic diagram on the bottom shows the evolution of the thread's cross-section.
Credit
Credit: JAXA/NAOJ
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