Signs of Resonant Absorption Observed by IRIS and Simulated by ATERUI (IMAGE)

National Institutes of Natural Sciences

Signs of Resonant Absorption Observed by IRIS and Simulated by ATERUI

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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