Local Magnetic Flux Emergence and Changes in Structure of Active Region Filaments

Physics

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Scientific paper

Studying photospheric processes in the filament regions is important for understanding the formation and destabilization of these objects. Filaments of active regions are convenient for studying. Full disk data of SOHO/MDI with the one-minute time resolution allow us to simultaneously track, in detail, the temporal changes of magnetic fields and mass motion. Use of TRACE data in the 171 A line enables one to see magnetic connection and localization of high-temperature processes in the region of emerging flux and form a fuller notion about the processes involved. Research of magnetic flux emergence at the polarity inversion line in NOAA 8525 and 9672, located in the northern and southern hemispheres respectively, and changes in filament structure is carried out in this work. At the first moments of magnetic flux emergence there is a local area of strong downward flow of substance, with velocities reached 1000 m/s, located near the tail polarity, while in the head polarity the velocities do not differ from the level of the surrounding photosphere. Interpretation of this phenomenon is given.

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