ФИАН
Научная деятельность
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Богачёв Сергей Александрович
доктор физ.-мат. наук
Контакты
Публикации
2015
- A. Reva, S. Shestov, I. Zimovets, S. Bogachev, S. Kuzin
Wave-like formation of Hot Loop Arcades 1 международная конференция 'Прикладная оптика-2004'. Сборник трудов. Т.2. Оптические технологии и материалы., vol. 290, N10, pp. 2909, (2015)
аннотация
We present observations of hot arcades made with the Mg XII spectroheliograph onboard the CORONAS-F mission, which provides monochromatic images of hot plasma in the Mg XII 8.42 Å resonance line. The arcades were observed to form above the polarity inversion line between active regions NOAA 09847 and 09848 at four successive episodes: at 09:18, 14:13, and 22:28 UT on 28 February 2002, and at 00:40 UT on 1March 2002. The evolution of the arcades can be described as: a) a small flare (precursor) appeared near the edge of the still invisible arcade, b) the arcade brightened in a wave-like manner – closer
loops brightened earlier, and c) the arcade intensity gradually decreased in 1 h. The esti- mated wave speed was 700 kms−1, and the distance between the hot loops was 50 Mm. The arcades formed without visible changes in their magnetic structure. The arcades were
probably heated up by the instabilities of the current sheet above the arcade, which were caused by a magnetohydrodynamic wave excited by the precursor
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