Würzburg 2018 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 8: Poster Session
EP 8.9: Poster
Mittwoch, 21. März 2018, 17:00–18:30, BSZ - Pabel HS
A regularised full-Newton VARPRO iteration for the stereoscopic reconstruction of loops in EUV images — Bernd Inhester1 and •Iulia Chifu1,2 — 1Max Planck Institute for Solar System Research,Goettingen,Germany — 2Astronomical Institute of Romanian Academy, Bucharest,Romania
The reconstruction of bright coronal loops from stereo pairs of EUV images is considered an important tool to disentangle the complex 3D topology of the coronal magnetic field. Reconstructed loops have been used in different cases for the study of the magnetic field topology. Also, stereoscopically reconstructed prominences when seen as arch-like structures have been used in the determination of the CME kinematics.
For the stereoscopic reconstruction one must follow two steps. First step is the tie-pointing of the same loop structure in each of the pair images. In this work, we present a reconstruction approach which takes care of the second step which is stereoscopic inversion. The procedure can take the placed tie-points from an image pair and calculate a spline-based approximation of the 3D loop shape from them. A preliminary version of our procedure has already been applied to observed image data in several cases. The work we present now is more robust since is using precise projective geometry for the image projection and can systematically be extended to any number of view directions.