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Proper Orthogonal and Dynamic Mode Decomposition of Sunspot Data.  

ABDULRAHMAN ALBIDAH   Submitted: 2020-11-12 02:29

High resolution solar observations show the complex structure of the magnetohydrodynamic (MHD) wave motion. We apply the techniques of POD and DMD to identify the dominant MHD wave modes in a sunspot using the intensity time series. The POD technique was used to find modes that are spatially orthogonal, whereas the DMD technique identifies temporal orthogonality. Here we show that the combined POD and DMD approaches can successfully identify both sausage and kink modes in a sunspot umbra with an approximately circular cross-sectional shape.

Authors: A. B. Albidah, W. Brevis, V. Fedun, I. Ballai, D. B. Jess, M. Stangalini, J. Higham and G. Verth
Projects: None

Publication Status: Accepted
Last Modified: 2020-11-16 16:41
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Proper Orthogonal and Dynamic Mode Decomposition of Sunspot Data.

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