Heidelberg 2022 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 12: Sun and Heliosphere

EP 12.9: Vortrag

Freitag, 25. März 2022, 13:30–13:40, EP-H1

Automatic computation of magneto-hydro-static equilibria from magnetograms and EUV-images — •Thomas Wiegelmann and Maria Madjarska — MPS, Göttingen

We present a newly developed tool that models the magnetic field in the solar atmosphere and matches individual field lines with observed structures with enhanced emission in EUV images. Presently, for quiet Sun regions, we can only measure the photospheric line-of-sight magnetic field, as accurate horizontal field measurements are not available. The photospheric magnetic-field measurements are extrapolated into the upper photosphere, chromosphere and corona with a magneto-hydro-static model. Free model parameters are then optimized with a downhill simplex method by comparing magnetic field lines quantitatively with the enhanced emission of various structures recorded in EUV images. The tool can be employed to obtain the magnetic and plasma properties of these structures above the photosphere. This could help to achieve a better understanding of the solar atmosphere and will help the constrain of the modelling of atmospheric structures.