文章基本信息

标题：Coronal energy release by MHD avalanches: continuous driving
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作者：J. Reid ; A. W. Hood ; C. E. Parnell 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2018
卷号：615
DOI：10.1051/0004-6361/201732399
语种：English
出版社：EDP Sciences
摘要：Previous work has confirmed the concept of a magnetohydrodynamic (MHD) avalanche in pre-stressed threads within a coronal loop. We undertook a series of full, three-dimensional MHD simulations in order to create three threads by twisting the magnetic field through boundary motions until an instability ensues. We find that, following the original instability, one unstable thread can disrupt its neighbours with continued driving. A “bursty” heating profile results, with a series of ongoing energy releases, but no evident steady state. For the first time using full MHD, we show that avalanches are a viable mechanism for the storing and release of magnetic energy in the solar corona, as a result of photospheric motions.
关键词：Key wordsenSun: coronaSun: magnetic fieldsmagnetohydrodynamics (MHD)methods: numerical