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Nonlinear force-free modeling of magnetic fields in flare-productive active regions

Published online by Cambridge University Press:  09 September 2016

M. S. Wheatland  and
S. A. Gilchrist
M. S. Wheatland
Affiliation:
School of Physics, University of Sydney, NSW 2006Australia email: michael.wheatland@sydney.edu.au
S. A. Gilchrist
Affiliation:
NorthWest Research Associates, 3380 Mitchell Lane, Boulder, CO 80301-2245USA email: sgilchrist@nwra.com
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Abstract

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We review nonlinear force-free field (NLFFF) modeling of magnetic fields in active regions. The NLFFF model (in which the electric current density is parallel to the magnetic field) is often adopted to describe the coronal magnetic field, and numerical solutions to the model are constructed based on photospheric vector magnetogram boundary data. Comparative tests of NLFFF codes on sets of boundary data have revealed significant problems, in particular associated with the inconsistency of the model and the data. Nevertheless NLFFF modeling is often applied, in particular to flare-productive active regions. We examine the results, and discuss their reliability.

Keywords

Sun: activitySun: coronaSun: flaresSun: magnetic fields
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S320: Solar and Stellar Flares and their Effects on Planets , August 2015 , pp. 167 - 174
Copyright
Copyright © International Astronomical Union 2016 

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