The Genesis of an Impulsive CME observed by AIA on SDO

Astronomy and Astrophysics – Astrophysics

Scientific paper

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[7513] Solar Physics, Astrophysics, And Astronomy / Coronal Mass Ejections

Scientific paper

Understanding the first moments in the life-time of Coronal Mass Ejections (CMEs), i.e. their genesis, represents possibly the key to unlock the physical processes responsible for their initiation. After this critical interval, which could last as little as few minutes for the most impulsive events, differences between various CME models become minimal. The recent launch of the SDO mission and the availability of high-quality EUV imaging from AIA in particular, opened a new avenue into CME initiation investigations with its unprecedented image cadence and multi-wavelength simultaneous coverage. We here report on AIA observations of an impulsive CME-flare-EUV wave event which took place during 13 June 2010. All the important dynamics (e.g., rise phase of the flare, impulsive acceleration of the CME) had a duration of only 10 minutes making this event a perfect showcase event for AIA. Taking advantage of the unique aspects of AIA data (12 sec cadence and 7 different EUV channels) we present a detailed analysis of this event which includes: (1) its kinematic behavior (acceleration profile); (2) radial and expansion speeds; (3) relationships between (1) and (2) with the flare energy release; (4) multi-temperature evolution of the early CME. All the above supply new strong constraints for the physics of impulsive CMEs.

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