Fractal Reconnection in Solar and Stellar Environments
Fractal Reconnection in Solar and Stellar Environments
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DOI：
10.1007/978-3-319-26432-5_10
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发表时间：
2016-06
期刊：
影响因子：
--
通讯作者：
K. Shibata;S. Takasao
中科院分区：
文献类型：
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作者：
K. Shibata;S. Takasao
最近对太阳的空间观测表明，磁场重联在太阳大气中无处不在，从小规模的重联（观察到的纳米耀斑）到大规模的重联（观察到的长时间耀斑或巨大的拱廊）。磁重联事件往往伴随着物质抛射或喷流，这似乎与分形电流片的多重等离子体团抛射密切相关。来自耀斑的爆发性射电和硬X射线辐射也表明了分形重联和相关的粒子加速。我们将讨论与太阳耀斑中的等离子体团诱导重联和分形重联有关的最新观测和理论，以及它们对重联物理和粒子加速的影响。最近发现的许多太阳型恒星的超耀斑，扩展了适用性的分形重联模型的太阳耀斑恒星耀斑更广泛的参数空间进行了讨论。
Recent space based observations of the Sun revealed that magnetic reconnection is ubiquitous in the solar atmosphere, ranging from small scale reconnection (observed as nanoflares) to large scale one (observed as long duration flares or giant arcades). Often the magnetic reconnection events are associated with mass ejections or jets, which seem to be closely related to multiple plasmoid ejections from fractal current sheet. The bursty radio and hard X-ray emissions from flares also suggest the fractal reconnection and associated particle acceleration. We shall discuss recent observations and theories related to the plasmoid-induced-reconnection and the fractal reconnection in solar flares, and their implication to reconnection physics and particle acceleration. Recent findings of many superflares on solar type stars that has extended the applicability of the fractal reconnection model of solar flares to much a wider parameter space suitable for stellar flares are also discussed.