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Formation and Eruption of an Active Region Sigmoid: I. Study by Nonlinear Force-Free Field Modeling
Chaowei Jiang, S. T. Wu, Xueshang Feng +1
We present a magnetic analysis of the formation and eruption of an active region (AR) sigmoid in AR 11283 from 2011 September 4 to 6. To follow the quasi-static evolution of the co…
Using Coordinated Observations in Polarised White Light and Faraday Rotation to Probe the Spatial Position and Magnetic Field of an Interplanetary Sheath
Ming Xiong, Jackie A. Davies, Xueshang Feng +4
Coronal mass ejections (CMEs) can be continuously tracked through a large portion of the inner heliosphere by direct imaging in visible and radio wavebands. White-light (WL) signat…
Preprocess the Photospheric Vector Magnetograms for NLFFF Extrapolation using a Potential Field Model and an Optimization Method
Chaowei Jiang, Xueshang Feng
Numerical reconstruction/extrapolation of coronal nonlinear force-free magnetic field (NLFFF) usually takes the photospheric vector magnetogram as input at the bottom boundary. Mag…
MHD Simulation of a Sigmoid Eruption of Active Region 11283
Chaowei Jiang, Xueshang Feng, S. T. Wu +1
Current magnetohydrodynamic (MHD) simulations of the initiation of solar eruptions are still commonly carried out with idealized magnetic field models, whereas the realistic corona…
Extrapolation of the Solar Coronal Magnetic Field from SDO/HMI Magnetogram by a CESE--MHD--NLFFF Code
Chaowei Jiang, Xueshang Feng
Due to the absence of direct measurement, the magnetic field in the solar corona is usually extrapolated from the photosphere in numerical way. At the moment, the nonlinear force-f…