Speaker
Description
First Name: Tom
Last Name: Van Doorsselaere
Affiliation: KU Leuven
All Authors: Tom Van Doorsselaere, Richard Morton, Yuhang Gao, Max McMurdo, Luka Banovic
Abstract: With the DKIST high resolution, high cadence observations, it is now possible to perform spectroscopy of coronal loops in the off-limb region. Using this spectroscopy, the omnipresence of kink waves is once again shown as quasi-periodic Doppler shifts. However, when the average line-of-sight motion is subtracted from the Doppler signal, a rotational motion is also visible. This is interpreted as the signal of torsional Alfven waves, that co-exist with the kink waves. We have constructed a numerical model for the co-existing kink and Alfven waves in coronal plumes. We extend this model to a period-averaged, large scale model to study the coronal heating effect of both these waves, going beyond the more traditional turbulence models that only consider Alfven waves.