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arXiv 2204.06010astro-ph.SRphysics.plasm-ph
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太阳耀斑与磁螺旋度

Solar Flares and Magnetic Helicity

Shin Toriumi, Sung-Hong Park

摘要:

太阳耀斑和日冕物质抛射是当前太阳系中最大的能量释放现象。它们导致各种波长的电磁波急剧增强,有时会将日冕物质喷射到行星际空间,扰乱包括地球在内的轨道行星的磁环境。一般认为,太阳耀斑是储存在活动区上方太阳大气中的磁能通过磁重联突然释放的现象。因此,为了阐明太阳耀斑的本质,估算磁场的复杂性并跟踪其演化是至关重要的。磁螺旋度是衡量日冕磁结构扭曲程度的一个指标,因此被用来量化和描述耀斑活动区的复杂性。本章概述了太阳耀斑,并讨论了如何使用磁螺旋度的不同概念来理解和预测太阳耀斑。

英文摘要:

Solar flares and coronal mass ejections are the largest energy release phenomena in the current solar system. They cause drastic enhancements of electromagnetic waves of various wavelengths and sometimes eject coronal material into the interplanetary space, disturbing the magnetic surroundings of orbiting planets including the Earth. It is generally accepted that solar flares are a phenomenon in which magnetic energy stored in the solar atmosphere above an active region is suddenly released through magnetic reconnection. Therefore, to elucidate the nature of solar flares, it is critical to estimate the complexity of the magnetic field and track its evolution. Magnetic helicity, a measure of the twist of coronal magnetic structures, is thus used to quantify and characterize the complexity of flare-productive active regions. This chapter provides an overview of solar flares and discusses how the different concepts of magnetic helicity are used to understand and predict solar flares.

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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