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The 3D Geometry, 3D Motion, and Hydrodynamics of Oscillating Coronal Loops View all abstracts by submitter

Markus J. Aschwanden   Submitted: 2009-01-31 12:19

We transition from two-dimensional (2D) imaging observations of kink-mode loop oscillations in the solar corona to three-dimensional (3D) reconstructions by exploring two new methods: (1) De-projection of 2D loop tracings using the strategy of curvature maximization in 3D space, based on the assumption of force-free magnetic fields; and (2) stereoscopic triangulation of epipolar loop coordinates using coaligned images from the STEREO EUVI/A and B spacecraft. Both methods reveal new features of oscillating loops: non-circularity, non-planarity, and helical geometries. We extend the 3D reconstruction techniques into the time domain and find indications of circularly polarized (torsional) kink-mode oscillations, in contrast to linearly polarized modes assumed previously. We discuss also hydrodynamic effects of coronal loops in non-equilibrium state that are essential for the detection and modeling of kink-mode oscillations.

Authors: Markus J. Aschwanden
Projects: STEREO

Publication Status: Space Science Reviews, Topical Issue on Coronal Seismology, (subm, Jan-31,2009)
Last Modified: 2009-02-01 10:17
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