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.
Nature
|April 28, 2017
概括
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,
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.
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