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The Astrophysical Journal, 693:L27L30, 2009 March 1 doi:10.1088/0004-637X/693/1/L27 c 2009. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
 

Summary: The Astrophysical Journal, 693:L27­L30, 2009 March 1 doi:10.1088/0004-637X/693/1/L27
c 2009. The American Astronomical Society. All rights reserved. Printed in the U.S.A.
EVIDENCE FOR A PRE-ERUPTIVE TWISTED FLUX ROPE USING THE THEMIS VECTOR MAGNETOGRAPH
A. Canou1
, T. Amari1,5,
, V. Bommier2
, B. Schmieder3
, G. Aulanier3
, and H. Li4
1 CNRS, Centre de Physique Th´eorique de l'Ecole Polytechnique, F-91128 Palaiseau Cedex, France; amari@cpht.polytechnique.fr
2 Observatoire de Paris, LERMA, 5 place Jules Janssen, F-92190 Meudon cedex, France
3 Observatoire de Paris, LESIA, 5 place Jules Janssen, F-92190 Meudon cedex, France
4 Purple Mountain Observatory, Nanjing 210008, People's Republic of China
Received 2008 December 15; accepted 2009 January 13; published 2009 February 11
ABSTRACT
Although there is evidence that twisted structures form during large-scale eruptive events, it is not yet clear
whether these exist in the pre-eruptive phase as twisted flux ropes (TFRs) in equilibrium. This question has
become a major issue since several theoretical mechanisms can lead to the formation of TFRs. These models
consider either the evolution of a coronal configuration driven by photospheric changes or the emergence of
TFR from the convection zone. We consider as a target for addressing this issue the active region NOAA

  

Source: Aulanier, Guillaume - Observatoire de Paris
Li, Hui - Purple Mountain Observatory

 

Collections: Physics