Material ejecta in a disturbed solar filament |
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Authors: | M. A. Raadu J. M. Malherbe B. Schmieder P. Mein |
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Affiliation: | (1) Department of Plasma Physics, Royal Institute of Technology, S-100 44 Stockholm, Sweden;(2) Observatoire de Paris, Section de Meudon, DASOP, UA 326, 92195 Meudon, Principal Cedex, France |
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Abstract: | H observations, using the Multichannel Subtractive Double Pass (MSDP) spectrograph operating on the Meudon Solar Tower, have been made of an active region filament which undergoes a disparition brusque. The period of observation was from 10 45 to 13 30 UT on 22 June, 1981. Velocity and intensity fluctuations in H were measured. The proper motions of ejecta were followed allowing their trajectories and vector velocities to be determined. To model the dynamics of ejecta several models using thermal or magnetic driving forces are compared. The most promising model explains the motion as the consequence of magnetic stresses acting on an isolated magnetized plasmoïd in a diverging flux tube. |
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