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Solar Physics (2006) 238: 245259 DOI: 10.1007/s11207-006-0252-9 C Springer 2006
 

Summary: Solar Physics (2006) 238: 245­259
DOI: 10.1007/s11207-006-0252-9 C Springer 2006
EVOLVING PHOTOSPHERIC FLUX CONCENTRATIONS
AND FILAMENT DYNAMIC CHANGES
B. SCHMIEDER, G. AULANIER, and P. MEIN
Observatoire de Paris, Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique,
F-92195 Meudon Cedex, France
(e-mail: brigitte.schmieder@obspm.fr)
and
A. L ŽOPEZ ARISTE
THEMIS, CNRS UPS 853, Via Lactea, 38200 La Laguna, Tenerife, Spain
(Received 29 June 2006; accepted 7 September 2006; Published online 8 November 2006)
Abstract. We analyze the role of weak photospheric flux concentrations that evolve in a filament
channel, in the triggering of dynamic changes in the shape of a filament. The high polarimetric
sensitivity of THEMIS allowed us to detect weak flux concentrations (few Gauss) associated with the
filament development. The synoptic instruments (MDI, SOLIS) even if their sensitivity is much less
than THEMIS were useful to follow any subsequent strengthening of these flux concentrations after
their identification in the THEMIS magnetograms. We found that (1) the northern part of the filament
develops an H barb at the same time that weak minority polarity elements develop near a plage; (2) a
section in the southern part of the H filament gradually disappears and later reforms at the same time

  

Source: Aulanier, Guillaume - Observatoire de Paris

 

Collections: Physics