Paper Title:
Magnetic Energy Buildup and Photospheric Motions in AR 8210

Author List:
Regnier, S., Canfield, R. C.

Abstract:
Using the 3D nonlinear force-free magnetic fields in AR 8210, we derive the
magnetic energy in the corona. Using vector magnetograms on the photosphere,
the Minimum Energy Fit (MEF, Longcope 2004) method allows us to estimate the
velocity fields. By combining those two techniques, we can demonstrate the
link between the injection of magnetic energy through the photosphere due to
transverse motions and the energy buildup in the corona. We also derive
magnetic helicities (Berger 1999) suggesting that the mutual helicity is the
main part of the magnetic helicity in AR 8210.

Poster:
No