Coronal Loop Mapping to Infer the Best Magnetic Field Models for Active Region Prominences

This article comments on the results of a new, rapid, and flexible manual method to map on-disk individual coronal loops of a two-dimensional EUV image into the three-dimensional coronal loops. The method by Gary, Hu, and Lee (2013) employs cubic Bézier splines to map coronal loops using only four f...

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Bibliographic Details
Published in:Proceedings of the International Astronomical Union 2013-06, Vol.8 (S300), p.416-417
Main Authors: Gary, G. Allen, Hu, Qiang, Lee, Jong Kwan
Format: Article
Language:English
Subjects:
Contributed Papers
Corona
Magnetic fields
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Summary:This article comments on the results of a new, rapid, and flexible manual method to map on-disk individual coronal loops of a two-dimensional EUV image into the three-dimensional coronal loops. The method by Gary, Hu, and Lee (2013) employs cubic Bézier splines to map coronal loops using only four free parameters per loop. A set of 2D splines for coronal loops is transformed to the best 3D pseudo-magnetic field lines for a particular coronal model. The results restrict the magnetic field models derived from extrapolations of magnetograms to those admissible and inadmissible via a fitness parameter. This method uses the minimization of the misalignment angles between the magnetic field model and the best set of 3D field lines that match a set of closed coronal loops. We comment on the implication of the fitness parameter in connection with the magnetic free energy and comment on extensions of our earlier work by considering the issues of employing open coronal loops or employing partial coronal loop.
ISSN:1743-9213
1743-9221
DOI:10.1017/S1743921313011344