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Decameter studies of the 5 September 1973 flare

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Abstract

We discuss the spectra and positions of the meter-decameter wavelength radio sources associated with the 5 September 1973 flare. We discuss the evolution of the size of the type II burst source and show that it fluctuates by a factor of 10, or larger. Consequently, the potential and kinetic energies associated with the shock are uncertain by the same factor. By comparing the positions of the type II and type III sources we conclude that while the shock wave associated with the type II was guided along high loops, the type III electrons were injected along open field lines which diverged within a short height in the corona. The characteristics of a particularly interesting type III burst with a low-frequency cut-off are discussed. We argue that nearby loops were not disrupted by the shock and that the energetic electrons produced during the event must have been injected at several sites and guided along open field lines at large distances from the flare to produce type III bursts.

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Authors and Affiliations

  1. Clark Lake Radio Observatory, Astronomy Program, University of Maryland, 20742, College Park, Md., U.S.A.

    T. E. Gergely & M. R. Kundu

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  1. T. E. Gergely
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  2. M. R. Kundu
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Gergely, T.E., Kundu, M.R. Decameter studies of the 5 September 1973 flare. Sol Phys 71, 65–75 (1981). https://doi.org/10.1007/BF00153607

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  • DOI: https://doi.org/10.1007/BF00153607

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