Computing nonlinear force-free fields in spherical geometry

Details Computing nonlinear force-free fields in spherical geometry Computing nonlinear force-free fields in spherical geometry

2006-12-05

arxiv.org/abs/astro-ph/0612124v1

SolarPhys.240:227-239,2007

Astronomy and Astrophysics

Astrophysics

16 pages, 3 figures, Solar Physics, accepted

Scientific paper

10.1007/s11207-006-0266-3

We describe a newly developed code for the extrapolation of nonlinear force-free coronal magnetic fields in spherical coordinates. The program uses measured vector magnetograms on the solar photosphere as input and solves the force-free equations in the solar corona. The method is based on an optimization principle and the heritage of the newly developed code is a corresponding method in Cartesian geometry. We test the newly developed code with the help of a semi-analytic solution and rate the quality of our reconstruction qualitatively by magnetic field line plots and quantitatively with a number of comparison metrics. We find that we can reconstruct the original test field with high accuracy. The method is fast if the computation is limited to low co-latitudes (say $30^\circ \leq \theta \leq 150^\circ$), but becomes significantly slower if the polar regions are included.

Affiliated with

Also associated with

No associations

Rating

Computing nonlinear force-free fields in spherical geometry does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Computing nonlinear force-free fields in spherical geometry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computing nonlinear force-free fields in spherical geometry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-717370