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The sudden disappearance of a dark filament observed on October 26, 1989

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Abstract

We present Hα monochromatic and spectroscopic observations of the sudden disappearance of a dark filament located near the center of the solar disk on October 26, 1989. The event was not associated with the flare activity. The dark filament first disintegrated into two loop-like components, and then each component successively showed ascending motion with a velocity greater than 30 km s−1. Comparison of the Hα pictures taken before and after the start of this event suggests that the dark filament was originally composed of two magnetic flux loops.

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Authors and Affiliations

  1. Kwasan and Hida Observatories, Kyoto University, 607, Kyoto, Japan

    Jun Kubota & Reizaburo Kitai

  2. Osaka Perfectural College of Technology, Neyagawa, 572, Osaka, Japan

    Ichiro Tohmura

  3. Department of Astronomy, Faculty of Science, Kyoto University, 603, Kyoto, Japan

    Akira Uesugi

Authors
  1. Jun Kubota
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  2. Reizaburo Kitai
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  3. Ichiro Tohmura
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  4. Akira Uesugi
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Kubota, J., Kitai, R., Tohmura, I. et al. The sudden disappearance of a dark filament observed on October 26, 1989. Sol Phys 139, 65–79 (1992). https://doi.org/10.1007/BF00147882

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  • DOI: https://doi.org/10.1007/BF00147882

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