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Three-dimensional magnetic field topology in a region of solar coronal heating

机译:太阳日冕加热区域的三维磁场拓扑

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摘要

Flares and X-ray jets on the Sun arise in active regions where magnetic flux emerges from the solar interior amd interacts with the ambient magnetic field. The interactions are believed to occur in electric current sheets separating regions of opposite magnetic polarity. The current sheets located in the corona or upper chromosphere have long been thought to act as an important source of coronal heating, requiring their location in the corona or upper chromosphere. The dynamics and energetics of these sheets are governed by a complex magnetic field structure that, until now, has been difficult to measure. Here we report the determination of the full magnetic vector in an interaction region near the base of the solar corona. The observations reveal two magnetic features that characterize young active regions on the Sun: a set of rising magnetic loops and a tangential discontinuity of the magnetic field direction, the latter being the observational signature of an electric current sheet. This provides strong support for coronal heating models based on the dissipation of magnetic energy at current sheets.
机译:太阳上的耀斑和X射线射流出现在活动区域​​,在活动区域​​中,从太阳内部发出的磁通量与环境磁场相互作用。认为相互作用发生在将相反极性的区域分开的电流片中。长期以来,人们一直认为位于日冕或上色球层中的当前薄片是日冕加热的重要来源,要求它们位于日冕或上色球层中。这些薄板的动力学和高能由一个复杂的磁场结构控制,该结构到目前为止一直难以测量。在这里,我们报告了在日冕的底部附近的相互作用区域中的完整磁矢量的确定。观测结果揭示了两个磁性特征,这些特征表征了太阳上的年轻活跃区域:一组上升的磁环和磁场方向的切向不连续性,后者是电流片的观测特征。基于当前工作表中的磁能消散,这为日冕加热模型提供了有力的支持。

著录项

  • 来源
    《Nature》 |2003年第6959期|p.692-695|共4页
  • 作者单位

    Max-Planck-Institut fuer Aeronomie, 37191 Katlenburg-Lindau, Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然科学总论;
  • 关键词

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