The sudden disappearance of a dark filament observed on October 26, 1989 |
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| Authors: | Jun Kubota Reizaburo Kitai Ichiro Tohmura Akira Uesugi |
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| Affiliation: | (1) Kwasan and Hida Observatories, Kyoto University, 607 Kyoto, Japan;(2) Osaka Perfectural College of Technology, Neyagawa, 572 Osaka, Japan;(3) Department of Astronomy, Faculty of Science, Kyoto University, 603 Kyoto, Japan |
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| Abstract: | We present H 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 H 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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