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arXiv 1606.09401astro-ph.SR
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太阳和恒星环境中的分形重联

Fractal Reconnection in Solar and Stellar Environments

Kazunari Shibata, Shinsuke Takasao

摘要:

最近对太阳的空间观测表明,磁重联在太阳大气层中无处不在,从小规模的重联(观测到的纳米耀斑)到大规模的重联(观测到的长时间耀斑或巨型弧)。通常,磁重联事件与质量喷射或喷流有关,这似乎与分形电流片的多重等离子体团喷射密切相关。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意义。本文还讨论了最近在太阳型恒星上发现的许多超级耀斑,这些发现将太阳耀斑的分形重联模型的适用范围扩展到更广泛的适合恒星耀斑的参数空间。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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