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Paper: What can we Learn from Nonlinear Force-Free Extrapolations?
Volume: 397, First Results From Hinode
Page: 75
Authors: R├ęgnier, S.
Abstract: Nonlinear force-free extrapolations are used to determine the 3D nature of the coronal magnetic field. The nonlinear force-free fields require knowledge of the vector magnetic field as boundary conditions at the photospheric or chromospheric level. The development of new vector magnetographs such as Hinode/SOT and SDO/HMI will certainly enhance the science that can be done by combining vector field measurements and nonlinear force-free extrapolations. Here, therefore, we summarize our current work on the key properties of a magnetic configuration: geometry, magnetic energy, magnetic helicity, connectivity and magnetic topology. Physical insights deduced from the magnetic configurations are discussed.
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