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Observations of flux rope formation prior to coronal mass ejections

Published online by Cambridge University Press:  06 January 2014

Lucie M. Green  and
Bernhard Kliem
Lucie M. Green
Affiliation:
Mullard Space Science Laboratory, UCL, Holmbury St. Mary, Dorking, Surrey, UK
Bernhard Kliem
Affiliation:
University of Potsdam, Institute of Physics & Astronomy, Potsdam, Germany
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Abstract

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Understanding the magnetic configuration of the source regions of coronal mass ejections (CMEs) is vital in order to determine the trigger and driver of these events. Observations of four CME productive active regions are presented here, which indicate that the pre-eruption magnetic configuration is that of a magnetic flux rope. The flux ropes are formed in the solar atmosphere by the process known as flux cancellation and are stable for several hours before the eruption. The observations also indicate that the magnetic structure that erupts is not the entire flux rope as initially formed, raising the question of whether the flux rope is able to undergo a partial eruption or whether it undergoes a transition in specific flux rope configuration shortly before the CME.

Keywords

Sun: coronal mass ejections (CMEs)Sun: activity
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S300: Nature of Prominences and their role in Space Weather , June 2013 , pp. 209 - 214
Copyright
Copyright © International Astronomical Union 2013 

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