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Shearing motions and torus instability in the 2010 April 3 filament eruption

Published online by Cambridge University Press:  06 January 2014

F. P. Zuccarello ,
P. Romano ,
F. Zuccarello  and
S. Poedts
F. P. Zuccarello
Affiliation:
Centre for mathematical Plasma Astrophysics, KU Leuven, Belgium INAF - Osservatorio Astrofisico di Catania, via S. Sofia 78, 95123 Catania, Italy
P. Romano
Affiliation:
INAF - Osservatorio Astrofisico di Catania, via S. Sofia 78, 95123 Catania, Italy
F. Zuccarello
Affiliation:
Dipartimento di Fisica e Astronomia, Sezione Astrofisica, Via S. Sofia 78, 95123 Catania, Italy
S. Poedts
Affiliation:
Centre for mathematical Plasma Astrophysics, KU Leuven, Belgium
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Abstract

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The magnetic field evolution of active region NOAA 11059 is studied in order to determine the possible causes and mechanisms that led to the initiation of the 2010 April 3 coronal mass ejection (CME).

We find (1) that the magnetic configuration of the active region is unstable to the torus instability and (2) that persistent shearing motions characterized the negative polarity, resulting in a southward, almost parallel to the meridians, drift motion of the negative magnetic field concentrations.

We conclude that these shearing motions increased the axial field of the filament eventually bringing the flux rope axis to a height where the onset condition for the torus instability was satisfied.

Keywords

Sun: filamentsSun: magnetic fieldsinstabilities
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. 475 - 476
Copyright
Copyright © International Astronomical Union 2013 

References

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