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Relative timing of microwave bursts and metric type III bursts. Implication on the energy of type III burst exciter

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Abstract

The propagation speed of the exciter of solar type III bursts is derived from observations with high space and time resolution at 22 GHz and 169 MHz. A survey of an active region during two successive days revealed a high degree of association between microwave and type III bursts. From a detailed investigation of their location and timing, which requires neither a coronal density model nor the assumption of radial propagation, the exciter is found to propagate at a speed above at least 0.6c, i.e., much faster than the commonly cited value of c/3. Type III bursts in the dm-m wave band, hence, may reveal the energization of electrons up to energies far above 100 keV.

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Authors and Affiliations

  1. Section de Meudon, D.A.S.O.P., Observatoire de Paris, 92195, Meudon, Principal Cedex, France

    A. Raoult, P. Lantos & K. L. Klein

  2. Instituto de Pesquisas espacias, C. Postal 515, 12200, Sao Jose dos Campos, S.P., Brazil

    E. Correla

  3. Escola Politecnica-PTR, Universidade de São Paulo, São Paolo, SP, Brazil

    P. Kaufmann

  4. Section de Meudon, D.E.S.P.A. Observatoire de Paris, 92195, Meudon, Principal Cedex, France

    G. de Genouillac

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  1. A. Raoult
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  2. E. Correla
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  3. P. Lantos
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  4. P. Kaufmann
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  5. K. L. Klein
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  6. G. de Genouillac
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Raoult, A., Correla, E., Lantos, P. et al. Relative timing of microwave bursts and metric type III bursts. Implication on the energy of type III burst exciter. Sol Phys 120, 125–136 (1989). https://doi.org/10.1007/BF00148538

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  • DOI: https://doi.org/10.1007/BF00148538

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