What we can learn from vector magnetic field
measurements about filaments?
B. Schmieder, A. Lopez, G. Aulanier
Theoretical models of filaments have predicted the existence of dips
in the magnetic field lines to support the cool material.
Condensation would be the mechanism of formation of filaments.
Are threads of footpoints or barbs
really vertical or
is it just due to the accumulation of material in dips one over the
other one?
The controverse is still alive, filament fine structures are of
dynamics nature and injection of cold material (or surges)
from the phtosphere would be the proposed mechanism.
Measurements of the vector magnetic field
in filament channels will be possible with SOLAR B and
answer to these questions.
Preliminary results have been obtained recently with THEMIS
magnetograph, suggesting that dips are really present in filament
channel leading to the conclusion that filament should be due to
plasma condensation.
Correspondence
Brigitte Schmieder (brigitte.schmieder@obspm.fr), Observatoire de Paris-Meudon
presentation
oral