Interpretation of patterns of drifting Zebra stripes |
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| Authors: | L Mollwo |
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| Institution: | 1. Zentralinstitut für solar-terrestrische Physik (Heinrich-Hertz-Institut) der Akademie der Wissenschaften der DDR, DDR-1199, Berlin
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| Abstract: | The earlier interpretation of the Zebra patterns by the concept of double resonance is examined for a realistic magneto-hydrostatic model of a coronal condensation over a bipolar spot group. It appears that the frequency drift of the Zebra stripes over a longer time can scarcely be explained by a change of state of the plasma as done till now. The proposed modified mechanism is based on a helical beam of electrons forming fronts that excite radiation at places of double resonance. Considering the field and density configuration conditions are found which produce drifting Zebra stripes. Structures of longer duration and absorptions arise from more or less overlapping stripe segments, which are excited by the fronts following one another in a beam of sufficient great length. The second stripe system of other drift direction found by Slottje (1972a) arises from lateral splitting of the beam. |
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