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EP: Extraterrestrische Physik

EP 2: Solare Korona

EP 2.1: Fachvortrag

Dienstag, 9. März 2004, 11:30–11:50, C

Coronal magnetic fields — •Thomas Wiegelmann — Max Planck Institut fuer Aeronomie

The solar magnetic field is an important quantity which couples the solar interior with the photosphere and atmosphere. Knowledge regarding the coronal magnetic field plays a key role for eruptive phenomena, e.g. coronal mass ejection, flares and eruptive prominences. Unfortunately a direct measurement of the coronal magnetic field is extremely difficult. Here we use more sound photospheric magnetic field measurements and extrapolate the magnetic field into the solar corona. The extrapolation method depends on assumptions regarding coronal electric currents. We give and overview regarding current-free, force-free and non-force-free reconstructions methods. The magnetic field reconstruction is consistent with stereoscopic and tomographic observations of the coronal plasma.