首页> 外文期刊>The Astrophysical journal >The Brightness Of Density Structures At Large Solar Elongation Angles: What Is Being Observed By Stereo Secchi?
【24h】

The Brightness Of Density Structures At Large Solar Elongation Angles: What Is Being Observed By Stereo Secchi?

机译:大太阳延伸角度下密度结构的亮度:Seceo Secchi观察到了什么?

获取原文
获取原文并翻译 | 示例
           

摘要

We discuss features of coronal mass ejections (CMEs) that are specific to heliospheric observations at large elongation angles. Our analysis is focused on a series of two eruptions that occurred on 2007 January 24-25, which were tracked by the Heliospheric Imagers (HIs) on board STEREO. Using a three-dimensional (3D) magnetohydrodynamic simulation of these ejections with the Space Weather Modeling Framework (SWMF), we illustrate how the combination of the 3D nature of CMEs, solar rotation, and geometry associated with the Thomson sphere results in complex effects in the brightness observed by the HIs. Our results demonstrate that these effects make any in-depth analysis of CME observations without 3D simulations challenging. In particular, the association of bright features seen by the HIs with fronts of CME-driven shocks is far from trivial. In this Letter, we argue that, on 2007 January 26, the HIs observed not only two CMEs, but also a dense corotating stream compressed by the CME-driven shocks.
机译:我们讨论日冕质量抛射(CME)的特征,这些特征特定于大伸长角下的日球观测。我们的分析着眼于2007年1月24日至25日发生的两次喷发,由STEREO上的日球成像仪(HIs)跟踪。使用太空天气建模框架(SWMF)对这些喷射进行的三维(3D)磁流体动力学模拟,我们说明了CME的3D性质,太阳旋转和与汤姆森球体相关的几何形状的组合如何导致复杂的效应。 HI观察到的亮度。我们的结果表明,这些效果可以在不进行3D模拟的情况下对CME观测值进行任何深入分析。特别是,HI所见的明亮特征与CME驱动的冲击波之间的联系并非无关紧要。在这封信中,我们认为,在2007年1月26日,HI不仅观察到两个CME,而且观察到了由CME驱动的冲击所压缩的密集的同向流。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号