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Consider the electric field of an oppositely charged, parallel-plate system and an imaginary box between those plates. Let the bottom face of the box be ABCD, and the top face be FGHK. The electric field between the plates is uniform and points from the positive plate toward the negative plate. The calculation of this field's flux through the box's various faces shows that the net flux through the box is zero. Why does the flux cancel out here?
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The magnetic flux measures the number of magnetic field lines passing through a given surface area. The SI unit for magnetic flux is the weber (Wb). Magnetic flux is a scalar quantity. It depends on three factors: the strength of the magnetic field B, the area through which the field lines pass, and the relative orientation of the field with the surface area.
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一个普遍的太阳爆发模型

Peter F Wyper1, Spiro K Antiochos2, C Richard DeVore2

  • 1Department of Mathematical Sciences, Durham University, Durham DH1 3LE, UK.

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|April 28, 2017
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此摘要是机器生成的。

太阳喷发,就像冠状质量喷射和喷射一样,可能有一个共同的起源. 模拟显示磁突破驱动喷射器通过重新连接,

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科学领域:

  • 太阳物理
  • 等离子天体物理学
  • 磁动力学

背景情况:

  • 太阳喷发,包括冠状质量喷射 (CMEs) 和冠状喷射,涉及从太阳射出磁化等离子体.
  • 传统上,CME被认为来自理想的磁动力不稳定性 (例如,扭曲或形不稳定性),而喷射则归因于磁重新连接.
  • 最近的观察表明,冠状喷流也由丝喷射驱动,类似于CME,暗示统一的物理起源.

研究的目的:

  • 调查导致太阳爆发的物理机制, 特别是冠状喷流.
  • 要确定一个单一的机制,如磁重新连接或理想的不稳定性,可以解释喷射和CME.
  • 测试光线喷射是不同规模太阳爆发的常见驱动因素的假设.

主要方法:

  • 由高度剪切的磁流绳 (丝) 的喷发驱动的冠状喷流的数值模拟.
  • 对模拟结果进行分析,以确定能量释放过程和磁拓变化.
  • 模拟结果与太阳爆发的理论模型和观测证据的比较.

主要成果:

  • 模拟表明磁重新连接是模拟冠状喷流期间的主要能量释放机制.
  • 观察到的过程是"磁性突破",在导线弹射和增强磁性重新连接之间的正反循环.
  • 结果表明,光线喷射与磁再连接相结合, 可以在不同的尺度上驱动太阳爆发.

结论:

  • 由导线喷射驱动的冠状喷流是通过磁突破机制的磁重新连接引起的.
  • 如果冠状体质量喷射和喷射具有共同的物理起源,那么磁性重新连接 (特别是磁性突破) 必须是通用的机制.
  • 磁性爆发模型为各种磁性驱动的太阳爆发提供了统一的解释.