An unusual behaviour of the white-light flare on 11 October, 1974 |
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| Authors: | C Fang S Y Yin E Hiei M D Ding Q J Fu |
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| Institution: | (1) Department of Astronomy, Nanjing University, Nanjing, 210093, China;(2) Meisei University, Hodokubo, HINO, 191 Tokyo, Japan;(3) Beijing Astronomical Observatory, 100080 Beijing, China |
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| Abstract: | It was found that in the spectrum of the white-light flare on 11 October, 1974, at the time of continuum maximum, the intensity of K1 in the Caii K line increased very significantly and reached nearly half of the continuum intensity. The duration of this unusual increase is less than 4 min. It seems that existing semi-empirical models can reproduce neither this characteristic nor the chromospheric condensation. |
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