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Dynamical interpretation of the very hot region appearing at the top of the loop

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Abstract

In order to explain the appearance of a hard X-ray source at the top of a loop, we present a model in which the dynamical effects of the dark filament mass infallng along the loop in association with the “disparition brusque” plays an important role. The crash of the infalling mass produces high temperature regions in the low corona above the two footpoints of the loop, and the up-going shocks, created in the crash and strengthened in propagating upwards along the steep density gradient in the tail of the infalling mass, produce a very high temperature (108 K) region upon colliding with each other near the top of the loop. Successive occurrence of this process in successively higher loops in magnetic arcade may account for the sources of gradual hard X-ray bursts appearing at the top of the loop-like structure.

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Authors and Affiliations

  1. Department of Earth Science, Aichi University of Education, Aichi Prefecture, Japan

    Kzunari Shibata

  2. Tokyo Astronomical Observatory, University of Tokyo, Japan

    Yutaka Uchida

  3. Department of Astronomy, University of Tokyo, Japan

    Takashi Sakurai

Authors
  1. Kzunari Shibata
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  2. Yutaka Uchida
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  3. Takashi Sakurai
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Shibata, K., Uchida, Y. & Sakurai, T. Dynamical interpretation of the very hot region appearing at the top of the loop. Sol Phys 86, 345–351 (1983). https://doi.org/10.1007/BF00157208

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  • DOI: https://doi.org/10.1007/BF00157208

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