Observation of An Evolving Magnetic Flux Rope Prior To and During A Solar Eruption

Дата и время публикации : 2012-03-22T00:19:41Z

Авторы публикации и институты :
J. Zhang
X. Cheng
M. D. Ding

Ссылка на журнал-издание: Nature Communications. 3 : 747, 2012
Коментарии к cтатье: 13 pages, 3 figures
Первичная категория: astro-ph.SR

Все категории : astro-ph.SR, astro-ph.EP, astro-ph.HE, physics.plasm-ph

Краткий обзор статьи: Explosive energy release is a common phenomenon occurring in magnetized plasma systems ranging from laboratories, Earth’s magnetosphere, the solar corona and astrophysical environments. Its physical explanation is usually attributed to magnetic reconnection in a thin current sheet. Here we report the important role of magnetic flux rope structure, a volumetric current channel, in producing explosive events. The flux rope is observed as a hot channel prior to and during a solar eruption from the Atmospheric Imaging Assembly (AIA) telescope on board the Solar Dynamic Observatory (SDO). It initially appears as a twisted and writhed sigmoidal structure with a temperature as high as 10 MK and then transforms toward a semi-circular shape during a slow rise phase, which is followed by fast acceleration and onset of a flare. The observations suggest that the instability of the magnetic flux rope trigger the eruption, thus making a major addition to the traditional magnetic-reconnection paradigm.

Category: Physics