Analysis of large deflections of prominence-CME events during the rising phase of solar cycle 24

Abstract

Motivated by the need to improve the ability to forecast whether a certain coronal mass ejection (CME) is to impact Earth, and by the insufficiency of statistical studies that analyze the whole erupting system with the focus on the governing conditions under CME deflections, we performed a careful analysis of 13 events along a one-year time interval showing large deflections from their source region. We used telescopes imaging the solar corona at different heights and wavelengths on board the Project for Onboard Autonomy 2 (PROBA2), Solar Dynamics Observatory (SDO), Solar TErrestrial RElations Observatory (STEREO), Solar and Heliospheric Observatory (SOHO) spacecraft and from National Solar Observatory (NSO). By taking advantage of the quadrature position of these spacecraft from October 2010 until September 2011, we inspected the 3D trajectory of CMEs and their associated prominences with respect to their solar sources by means of a tie-pointing tool and a forward model. Considering the coronal magnetic fields as computed from a potential field source surface model, we investigate the roles of magnetic energy distribution and kinematic features in the non-radial propagation of both structures. The magnetic environment present during the eruption is found to be crucial in determining the trajectory of CMEs, in agreement with previous reports.

32 pages, 16 figures

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• The Magnetic Environment of a Stealth Coronal Mass Ejection
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• Analysis of solar eruptions deflecting in the low corona: influence of the magnetic environment
• The Kinematical Behavior of Solar Eruptive Filaments Affected by the Poloidal Magnetic Field
• Formation and rising phase of a flux rope through data-constrained simulations
• Early Evolution of Earth-Directed Coronal Mass Ejections in the Vicinity of Coronal Holes
• On the analysis of eruptive events with non-radial evolution