[1] Max Planck Inst Solar Syst Res, D-37077 Gottingen, Germany
[2] Max Planck Princeton Ctr Plasma Phys, Princeton, NJ 08540 USA
[3] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08540 USA
[4] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08540 USA
[5] Univ New Hampshire, Ctr Integrated Computat & Anal Reconnect & Turbul, Durham, NH 03824 USA
[6] Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA