1209.5211 (Ioannis Contopoulos)

The Force-Free Electrodynamics Method for Nonlinear Extrapolation from Vector Magnetograms    [PDF]

Ioannis Contopoulos

We present a new improved version of our force-free electrodynamics (FFE) numerical code in spherical coordinates that extrapolates the magnetic field in the inner solar corona from a photospheric vector magnetogram. The code satisfies the photospheric boundary condition and the condition divB=0 to machine accuracy. The performance of our method is evaluated with standard convergence parameters, and is found to be comparable to that of other nonlinear force-free extrapolations.

View original: http://arxiv.org/abs/1209.5211