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Figure 1: (Above) coordinate system for a thin penumbral flux tube. (Below) schematic representations of a typical "normal'' flux tube configuration (non-serpentine) of the SJS model and a typical arched flux tube configuration of the TM siphon-flow model. |
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Figure 2: (Above) schematic diagram of a serpentine flux tube configuration of Schlichenmaier (2002, 2003), with sections of downward and upward concavity marked. (Below) sketch showing the plane of the axis of the serpentine configuration tilted away from the vertical. Also shown is the force balance among the centrifugal force (CF), the magnetic tension force (TF), and the buoyancy force (BF) at a high point (A) and low point (B) along the serpentine configuration. |
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