磁膜喷流形成受太阳风结构参数的影响
Florian Koller1, Ferdinand Plaschke2, Manuela Temmer1
1Institute of Physics University of Graz Graz Austria.
概括
磁层喷流与太阳风结构有关. 冠状质量喷射 (CMEs) 和流相互作用区域 (SIRs) 影响喷气产生,高速流 (HSSs) 对于喷气产生最有利.
科学领域:
- 空间物理 空间物理
- 等离子体物理学的物理学
- 太阳风与磁层的相互作用
背景情况:
- 磁层喷流是源自前冲击过程的动态压力增强.
- 之前的研究表明,冠状质量喷射 (CME) 期间的喷射较少,而流相互作用区域 (SIR) 期间的喷射较多.
- 在CME和SIR内部的子结构对喷气式飞机生产的影响仍然不清楚.
研究的目的:
- 调查CME和SIR亚体结构与磁层喷气生产之间的关系.
- 确定特定的太阳风参数,这些参数控制着不同太阳风结构内的喷气发生.
- 在各种太阳风条件下比较喷气式生产概率.
主要方法:
- 2008-2021年THEMIS和OMNI卫星数据的分析.
- 在CME中区分压缩和磁弹射 (ME) 区域.
- 识别SIRs的压缩区域,流界面和高速流 (HSS).
- 根据角和阿尔夫恩马赫数计算喷气发生的二维概率分布.
- 使用1D直方图来分析参数依赖关系.
主要成果:
- 在CME-MEs内部,高角和低阿尔夫文马赫数对喷气式生产不利.
- 中小企业中的这些条件可能会阻碍形成一个明确的前震区域.
- 高速流 (HSSs) 为喷气发电提供了最有利的条件.
- 有利的HSS条件包括低角,低密度和低磁场强度.
结论:
- 太阳风干扰的基层结构显著影响磁层喷气的产生.
- 与其他结构相比,CME的磁弹射区域对喷气形成不利.
- 高速流提供了最佳的太阳风条件,可以产生磁层喷气,因为它们具有特定的等离子体和电场特性.
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