Regensburg 2007 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 8: Sonne

EP 8.3: Talk

Wednesday, March 28, 2007, 14:30–14:45, H46

Analysis of the loop stratification and dynamics using a 3D MHD coronal model — •Sven Bingert and Hardi Peter — Kiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6, 79104 Freiburg

The magnetic field strongly influences the structure and the dynamics of the transition region and the corona. In contrast to the photosphere the direction and strength of the magnetic field vector in the upper atmosphere can not be determined. Thus it is valuable to employ a 3D MHD model for the analysis of the evolution of coronal loops. Modeling is done using the complete set of MHD equations including braiding of magnetic field lines as a heating mechanism. Therefrom we derive the magnetic field lines forming the coronal structures as well as their evolution in time. We will present a detailed analysis of the loop stratification and dynamics. Methods using a linear force free or potential field extrapolation to derive a 3D magnetic field from observed photospheric magnetograms will be discussed.