Acceleration in Fast Halo CMEs and Synchronized Flare HXR Bursts
M. Temmer (1),
A. Veronig (2),
B. Vrsnak (1),
J. Rybák (3),
P. Gomory (3),
S. Stoiser (2),
D. Maricic (1)
1 - Hvar Observatory, Faculty of Geodesy, University of Zagreb, Kaciceva 26, HR-10000 Zagreb, Croatia
2 - IGAM/Kanzelhoehe Observatory, Institute of Physics, Universiteat Graz, Universiteatsplatz 5, A-8010 Graz, Austria
3 - Astronomical Institute, Slovak Academy of Sciences, SK-05960 Tatranská Lomnica, Slovakia
We study two well-observed, fast halo CMEs, covering the full CME kinematics including the initiation and impulsive acceleration phase, and their associated flares. We find a close synchronization between the CME acceleration profile and the flare energy release as indicated by the RHESSI hard X-ray flux onsets, as well as peaks occur simultaneously within 5 minutes. These findings indicate a close physical connection between both phenomena and are interpreted in terms of a feedback relationship between the CME dynamics and the reconnection process in the current sheet beneath the CME.
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