3-D magnetic configurations supporting prominences III. Evolution of fine structures observed in a filament channel

摘要: On September 25 th 1996, a quiescent filament lo- cated near the center disc (S2, E5) was observed on German VTT (Tenerife) with MSDP instrument, in H line cen- ter and wings. SOHO/MDI line-of-sight magnetograms were co-aligned images, showing position evolution of lateral feet vicinity parasitic magnetic polarities channel. Using assumptions developed previous papers this series related to reconstruction 3-D con- figuration filaments, we perform "linear magnetohydrostatic" extrapolations (taking into account effects plasma pres- sure gravity) magnetograms. The main hypothesis is presence twisted flux-tube located above photospheric inversion line. Assuming that parameters model do not need be significantly modified during configuration for duration 1 day, have shown distribution dipped field lines well correlated dark absorbing features channel: itself, its some surrounding fibrils. In way confirm what suggested our earlier papers, i.e. are composed portions lines, which form continuous pattern from corona photosphere. We propose same explanation fibrils show responsible existence most dips, however their inclusion helps get better correspondence between observations. find average Doppler velocities associated chromospheric order few hundred m s (though it can go locally up 3 km filament). These upward consistent quasi-static support dense dips.