Bonn 2010 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 15: Sun I

EP 15.3: Vortrag

Donnerstag, 18. März 2010, 17:30–17:45, AKM

Plasmoid/plasmoid and plasmoid/loop-top interactions and particle acceleration in solar flares — •Miroslav Bárta^1,2, Jörg Büchner¹, and Marian Karlický² — ¹Max-Planck-Institut für Sonnensystemforschung, D-37191 Katlenburg-Lindau, Germany — ²Astronomical Institute of Czech Academy of Science, CZ-25165 Ondřejov, Czech Republic

Using the Adaptive-Mesh-Refinement (AMR) MHD numerical model we simulated current-sheet fragmentation in solar flares. The AMR technique allowed us to study processes in the flare current sheet within a larger range of scales. In agreement with the concept of cascading/fractal reconnection (Shibata and Tanuma, Earth, Planets, and Space 53, 2001) we found the cascade of mutually interacting magnetic islands (plasmoids) formed on various spatial scales. We would like to demonstrate the importance of mutual plasmoid/plasmoid and plasmoid/loop-top interactions for energy release and particle acceleration in solar flares. We shall show some observable predictions of our simulations and their comparison with observations.