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NAM2012 - All Presentation Details

Record 627 of 756

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Nonlinear force-free coronal magnetic field modelling with SDO

Author: Thomas Wiegelmann

Max-Planck Institut fuer Sonnensystemforschung

Co-Authors: J.K. Thalmann; B. Inhester; T. Tadesse; X. Sun; J.T. Hoeksema

Session: SP2: Solar coronal magnetic fields

Presentation type: Poster      Poster Session B   

Summary:

The SDO/HMI instrument provides photospheric vector magnetograms with a high spatial and temporal resolution. We extrapolate these measurements into the solar corona, assuming a force-free state. We use an updated version of our nonlinear force-free optimization code, which allows to incorporate measurement errors in the photospheric magnetic field vector. We evaluate the resulting 3D equilibria by means of how well the force-freeness and solenoidal conditions are fulfilled, the angle between the magnetic field and the electric current and by comparing projections of magnetic field lines with loops visible in coronal images from SDO/AIA.

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