Berlin 2014 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 8: Sonne und Heliosphäre (II)
EP 8.3: Vortrag
Freitag, 21. März 2014, 11:15–11:30, DO24 1.103
Coronal active region modeling based on SDO data — •Stephan Barra1,2, Wiegelmann Thomas1, and Fichtner Horst2 — 1MPI für Sonnensystemforschung — 2Ruhr-Universität Bochum
The heating of the solar corona, which has a temperature of order of 106 K compared to 5000K in the photosphere, is yet a puzzling problem. Several models to describe the physical parameters, e.g. temperature or density, along coronal loops with different assumptions for the relevant physical processes (like wave damping) were suggested in the past, for example the RTV78 model by Rosner, Tucker and Vaiana. With these models and the knowledge of the 3D configuration of the magnetic field above an active region it is possible to calculate the radiation emitted by the coronal loops above this region. This 3D field configuration is provided for an active region with the help of a nonlinear force free field optimization code from photospheric SDO/HMI vector magnetogramms as boundary conditions. We use this field to model the plasma along these loops with the RTV78 model and create artificial coronal images in different wavelength, which we compare with images obtained with the multispectral imager SDO/AIA. The same has been done with a potential field reconstructed from the same data set. Such comparisons allow us to evaluate the quality of our model approach.