HR: 09:30h
AN: SH31A-05    [Abstracts]
TI: Non-linear force-free field modeling: model techniques, boundary conditions, hares, and hounds
AU: Schrijver, C J
EM: schryver@lmsal.com
AF: Lockheed Martin Advanced Technology Center, ADBS/252, 3251 Hanover Street, Palo Alto, CA 94304 United States
AU: * DeRosa, M L
EM: derosa@lmsal.com
AF: Lockheed Martin Advanced Technology Center, ADBS/252, 3251 Hanover Street, Palo Alto, CA 94304 United States
AU: Metcalf, T
EM: metcalf@lmsal.com
AF: Lockheed Martin Advanced Technology Center, ADBS/252, 3251 Hanover Street, Palo Alto, CA 94304 United States
AB: Understanding the conditions under which solar magnetic fields can destabilize to erupt in flares and coronal mass ejections requires a quantitative understanding of the coronal magnetic field and of the currents that it carries. The increased availability of vector magnetograms, together with EUV and X-ray coronal images, should provide adequate constraints to model the coronal field, and thus to visualize its 3D geometry and to measure the available free energy and helicity. Non-linear force-free fields (NLFFF) are likely a useful model to use when extrapolating the solar surface field upward into the coronal volume. It may even be possible to use the observed trajectories of coronal loops, evident in EUV images of the corona, as a further constraint. We present initial results of a team effort to understand the intricacies of NLFFF modeling: we discuss and evaluate comparisons of NLFFF models computed with different models and applications of boundary conditions, and look ahead to full coronal field modeling for the upcoming Solar-B and SDO missions.
DE: 7524 Magnetic fields
DE: 7594 Instruments and techniques
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2005 Joint Assembly