用STEREO对太阳极小期CME的综合观测
Comprehensive Observations of a Solar Minimum CME with STEREO
摘要：
我们进行了第一次运动学分析的成像和原位仪器上STEREO，即SECCHI，塑料，和IMPACT实验观察到的日冕物质抛射。CME于2008年2月4日发射，使用STEREO航天器上的SECCHI成像仪从初始到1 AU连续跟踪CME，然后由STEREO-B上的PLASTIC和IMPACT粒子和场探测器探测。ACE和SOHO/CELIAS也在地球的L1拉格朗日点原位探测到CME。CME在2008年2月7日击中了STEREO-B，ACE和SOHO，但完全错过了STEREO-A。这个事件提供了一个很好的例子，说明从不同的角度来看同一事件会有多么不同。我们还展示了许多方式，在这种CME的全面和连续的覆盖面STEREO提高我们的评估其运动学行为的信心，与潜在的影响空间天气预报。这些观测提供了几条证据，支持CME的可观测部分在角度范围上是狭窄的，这对于决定如何最好地将观测到的CME从太阳中心到实际太阳中心距离的延伸角转换为决定至关重要。
英文摘要：
We perform the first kinematic analysis of a CME observed by both imaging and in situ instruments on board STEREO, namely the SECCHI, PLASTIC, and IMPACT experiments. Launched on 2008 February 4, the CME is tracked continuously from initiation to 1 AU using the SECCHI imagers on both STEREO spacecraft, and is then detected by the PLASTIC and IMPACT particle and field detectors on board STEREO-B. The CME is also detected in situ by ACE and SOHO/CELIAS at Earth's L1 Lagrangian point. The CME hits STEREO-B, ACE, and SOHO on 2008 February 7, but misses STEREO-A entirely. This event provides a good example of just how different the same event can look when viewed from different perspectives. We also demonstrate many ways in which the comprehensive and continuous coverage of this CME by STEREO improves confidence in our assessment of its kinematic behavior, with potential ramifications for space weather forecasting. The observations provide several lines of evidence in favor of the observable part of the CME being narrow in angular extent, a determination crucial for deciding how best to convert observed CME elongation angles from Sun-center to actual Sun-center distances.
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