模拟太阳黑子中的半阴结构和流出
M Rempel1, M Schüssler, R H Cameron
1High Altitude Observatory, National Center for Atmospheric Research (NCAR), Post Office Box 3000, Boulder, CO 80307, USA. rempel@hao.ucar.edu
Science (New York, N.Y.)
|June 23, 2009
概括
太阳黑子半影表现出向外流,这是一个世纪以来观察到的现象. 我们的模拟显示,当磁场倾斜超过45度时,由对流能量传输驱动时,这些流出现.
科学领域:
- 太阳物理 太阳物理
- 磁动力学 磁动力学
- 血物理学的等离子体物理学
背景情况:
- 太阳黑子是太阳表面强烈磁场的区域.
- 太阳黑子中的半阴外流已知100年.
- 这些流与能量传输和磁场结构有关.
研究的目的:
- 为了研究太阳黑子半中向外流的形成机制.
- 为了确定产生这些流动的关键磁场倾斜度.
- 了解这些流在太阳能运输中的作用.
主要方法:
- 一对太阳黑子的全面数值模拟.
- 模拟太阳黑子内的对流能传输的分析.
- 模拟磁场倾斜对等离子体流动的影响.
主要成果:
- 当平均磁场倾斜超过大约45度时,外向流的半阴影结构形成.
- 这些外流是对流动流的组成部分,负责上升的能量传输.
- 倾斜的磁场引入了异构性,驱动了系统的外流.
结论:
- 磁场的倾斜是形成太阳黑子半阴流的关键因素.
- 这些外流在太阳的能量传输过程中起着至关重要的作用.
- 数字模拟为复杂的太阳现象提供了宝贵的见解.
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