Acceleration in Fast Halo CMEs and Synchronized Flare HXR Bursts
Authors:
M. Temmer, A. Veronig, B. Vrsnak, J. Rybak, P. Gomory, S. Stoiser, D. Maricic
Image & caption:
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Image caption::
2006 July 6 event: From top to bottom, distance-time profile d(t), velocity v(t), and acceleration a(t) of the CME as observed by different instruments (different plot symbols specified in the legend). In the bottom panel, we plot also the RHESSI 30-50 keV HXR flux of the associated flare. The left panels show the full CME height range covered by the LASCO FOV. The right panels zoom into the early acceleration phase of the CME.
Description:
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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