Solar filaments - comparing multi-wavelength observations with magnetic modelling
Abstract
Multi-wavelength observations of a filament/prominence obtained during campaigns with the space missions (SOHO, Yohkoh, TRACE) open a new research field. Physical conditions of filaments and their environment (i.e. temperature, dynamcis, electron density) provides important constraints on theories of formation, stability or instability. The fine structures of filament are discussed in the framework of magnetic configurations: Is the prominence field a sheared arcade or a twisted flux rope? What is the magnetic structure of the footpoints of prominences called also "barbs"? Are the field lines dipped or are they vertical? We present some new developments of 3-D models of a bipolar magnetic field and twisted flux tube which explain the fine structures in prominences as well as the feet. The new models bring valuable information on the global solar magnetic field with direct implications for dynamo theories and on the helicity of the heliosphere.
- Publication:
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The Sun and Sun-Like Stars
- Pub Date:
- 2000
- Bibcode:
- 2000ssls.work...57S
- Keywords:
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- Solar Filaments;
- Multi-Wavelength Observations