Study of a Prominence Eruption using PROBA2/SWAP and STEREO/EUVI Data

Abstract

Observations of the early rise and propagation phases of solar eruptive prominences can provide clues about the forces acting on them through the behavior of their acceleration with height. We have analyzed such an event, observed on 13 April 2010 by SWAP on PROBA2 and EUVI on STEREO. A feature at the top of the erupting prominence was identified and tracked in images from the three spacecraft. The triangulation technique was used to derive the true direction of propagation of this feature. The reconstructed points were fitted with two mathematical models: i) a power-law polynomial function and ii) a cubic smoothing spline, in order to derive the accelerations. The first model is characterized by five degrees of freedom while the second one is characterized by ten degrees of freedom. The results show that the acceleration increases smoothly and it is continuously increasing with height. We conclude that the prominence is not accelerated immediately by local reconnection but rather is swept away as part of a large-scale relaxation of the coronal magnetic field.

15 Pages, Accepted for publication in Solar Physics, PROBA2 Topical Issue

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• Connecting 3D evolution of Coronal Mass Ejections to their Source Regions
• Observations of the Coronal Mass Ejection with a Complex Acceleration Profile
• Analysis of large deflections of prominence-CME events during the rising phase of solar cycle 24
• Evolution of Coronal Cavity from Quiescent to Eruptive Phase in Association with Coronal Mass Ejection