论文标题
2010年8月18日事件的冠状质量弹射和太阳风爆发流的形成
Formation of Coronal Mass Ejection and Post-eruption Flow of Solar Wind on 2010 August 18 event
论文作者
论文摘要
太空环境的状态对于预测太阳风（SW）产生的地磁风暴的预测起着重要作用。穿过Heliosphere的冠状质量弹出（CME）通常会延长（长达几天）的速度，速度下降，这会影响随后的SW流的传播。我们研究了2010年8月18日的CME后方的CME和爆发后的等离子体流，几种空间仪器在正交中观察到了CME。通过EUV望远镜和加冕典礼对电晕发射的观察结果表明，几个离散的流出，随后是连续的无结构后喷发后流。与该CME相关的星际冠状质量射血（ICME）由等离子体和外部离子组成（塑料）仪器在太阳陆地关系天文台（Stereo-a）上注册，在8月20日，16:14 UT UT和8月21日至13:14 UT之后，SW造成了SW扰动。通过使用基于引力和阻力模型的运动学考虑，已表明离散的等离子体流可以与ICME相关联，而后喷发流出到达SW瞬时的下降部分。我们使用从差分发射度量分析得出的射血区域中的血浆温度和密度模拟了ICME和CME后SW的Fe-ION电荷分布。结果表明，在所研究的事件中，后ICME后尾区与电晕后的爆发流相关，而不是与CME夹带的环境SW有关。
The state of the space environment plays a significant role for forecasting of geomagnetic storms produced by disturbances of the solar wind (SW). Coronal mass ejections (CMEs) passing through the heliosphere often have a prolonged (up to several days) trail with declining speed, which affects propagation of the subsequent SW streams. We studied the CME and the post-eruption plasma flows behind the CME rear in the event on 2010 August 18 observed in quadrature by several space-based instruments. Observations of the eruption in the corona with EUV telescopes and coronagraphs revealed several discrete outflows followed by a continuous structureless post-eruption stream. The interplanetary coronal mass ejection (ICME), associated with this CME, was registered by PLAsma and SupraThermal Ion Composition (PLASTIC) instrument aboard the Solar TErrestrial RElations Observatory (STEREO-A) between August 20, 16:14 UT and August 21, 13:14 UT, after which the SW disturbance was present over 3 days. Kinematic consideration with the use of the gravitational and Drag-Based models has shown that the discrete plasma flows can be associated with the ICME, whereas the post-eruption outflow was arrived in the declining part of the SW transient. We simulated the Fe-ion charge distributions of the ICME and post-CME parts of SW using the plasma temperature and density in the ejection region derived from the Differential Emission Measure analysis. The results demonstrate that in the studied event the post-ICME trailing region was associated with the post-eruption flow from the corona, rather then with the ambient SW entrained by the CME.
