Speaker
ABDULRAHMAN ALBIDAH
(The University of Sheffield)
Description
High-resolution solar observations show the complex structure of the magnetohydrodynamic (MHD) wave motion. We apply the Proper Orthogonal Decomposition (POD) and Dynamic Mode Decomposition (DMD) techniques to identify the dominant MHD wave modes in a sunspot with a circular cross-sectional shape, 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 show the appearance of both the slow body sausage and kink modes in a sunspot umbra with an approximately circular cross-sectional shape.
Primary author
ABDULRAHMAN ALBIDAH
(The University of Sheffield)
Co-authors
Dr
Istvan Ballai
(The university of Sheffield)
Dr
Viktor Fedun
(The University of Sheffield )
Dr
Gary Verth
(The University of Sheffield)
