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A New Technique for a Routine Azimuth Disambiguation of Solar Vector Magnetograms View all abstracts by submitter

Manolis K. Georgoulis   Submitted: 2005-06-29 14:34

We introduce a non-potential magnetic field calculation (NPFC) technique to perform azimuth disambiguation in solar vector magnetograms. It is shown that resolving the 180-degree ambiguity would be a numerically fully determined problem if the vertical electric current density was known a priori. Since this is not the case, we explicitly impose a minimum-magnitude current density solution. The NPFC disambiguation is otherwise assumption-free, with the quality of the results depending on the quality of the measurements. The NPFC method first infers the non-potential magnetic field component responsible for the assumed vertical currents and then determines the vertical magnetic field whose potential extrapolation added to the non-potential field best reproduces the observationally inferred horizontal magnetic field. The technique is fast, effective, and physically sound, so it may be instrumental to a routine, real-time, disambiguation of future space-borne solar vector magnetograms.

Authors: Georgoulis, M. K.
Projects: None

Publication Status: ApJ Letters, in press
Last Modified: 2005-06-29 14:34
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