2024年9月9日太阳背面喷发的多航天器观测结果导致持续的马射线发射事件
Nat Gopalswamy1, Pertti Mäkelä1,2, Sachiko Akiyama1,2
1NASA Goddard Space Flight Center, Greenbelt, MD USA.
概括
太阳背后的一次强烈的太阳爆发
科学领域:
- * 太阳物理
- *高能天体物理学
- * 太空天气
背景情况:
- 持续马射线发射 (SGRE) 是一种罕见而强烈的现象.
- 了解它们的起源对于太空天气预测至关重要.
- 之前的研究主要集中在前沿事件上,而后端事件的理解较少.
研究的目的:
- * 为了分析Fermi/LAT观察到的最近的SGRE后肢事件.
- * 调查太阳爆发,冠状质量喷射 (CMEs) 和能量粒子之间的联系.
- 为了比较后肢事件与前端事件,并确定共同的特征.
主要方法:
- *用于SGRE事件检测的费米/LAT数据分析.
- *多个太空船观测 (SOHO,STEREO,PSP,SOLO,SDO,Wind,GOES) 用于太阳喷发的特征.
- * 冠状质量喷射 (CME) 流绳建模和能量粒子分析 (质子和电子).
- * 与之前报告的后肢SGRE事件进行比较.
主要成果:
- * 2024年9月9日的一次重大SGRE事件,与后侧太阳爆发有关.
- * 观察到强烈的X3.3耀斑和快速加速的CME (峰值速度为2162公里/秒).
- * 检测到高达1GeV的能量质子和电子,与延长的冲击有关.
- * 事件持续时间与SGRE事件的确定的关系保持一致.
- * 其他六个后肢SGRE事件证实能量冲击驱动的CME是源头.
- 在四肢后源区域的位置上发现了 3:1 的东西不对称性.
结论:
- *扩展的CME驱动的冲击是SGRE事件的高能质子的主要来源.
- 后肢SGRE事件与前端事件具有共同的特征,表明它们具有共同的物理机制.
- * 观察到的东西不对称性可能为这些事件的传播和源特性提供了洞察力.
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