Arch Filament Systems Associated with X-Ray Loops |
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Authors: | Malherbe J M Schmieder B Mein P Mein N Van Drielgesztelyi L Von Uexküll M |
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Institution: | (1) Section de Meudon, DASOP, Observatoire de Paris, F-92195 Meudon, France;(2) Konkoly Observatory, Budapest, Pf. 67, H-1525, Hungary;(3) Kiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6, D-79104 Freiburg, Germany |
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Abstract: | Using multi-wavelength observations obtained with the Tenerife telescopes (VTT and GCT) and with the Yohkoh satellite, we observed new emerging flux with an associated arch filament system (AFS) in the chromosphere and bright X-ray loops in the corona. We observed the change of connectivity of the X-ray loop footpoints which may be at the origin of the occurrence of a subflare. Densities, gas and magnetic pressures of cold AFS and hot loops were derived and discussed. The extrapolation of the photospheric magnetic field observed with the GCT in a linear force-free field assumption (constant ) shows that this region, in spite of having roughly a global potential configuration, consists of two systems of arch filaments. We found these two systems best fitted with two sheared magnetic topologies of opposite values of ± 0.1 Mm-1 |
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