Recurrent mass ejections observed in Hα and CIV |
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Authors: | B Schmieder G Simon M-J Martres P Mein N Mein E Tandberg-Hanssen |
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Institution: | 1. Paris-Meudon, Observatory, 92195 Meudon, France;7. Marshall Space Flight Center, AL 35812, USA |
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Abstract: | Time sequences of recurrent mass ejections have been observed during a coordinated SMY program (1 Sept. 1980 – 23 Sept. 1980 – 2 Oct. 1980).Comparison of the temporal evolution of Hα and CIV brightnesses shows a weak phase lag between H α and CIV maxima, in the case of homologous flares, with CIV brightness maxima preceding H α maxima. The analysis of the variation of the ejection velocities is expected to lead to the determination of an energy balance.Such recurrent ejections could be due to periodic energy storage and periodic reorganisation of magnetic field as envisaged to occur for flares, but at lower energy levels. |
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