X-ray emission generated through solar-wind charge exchange (SWCX) is known to contaminate X-ray observation data, the amount of which is often significant or even dominant, particularly in the soft X-ray band, when the main target consists of comparatively weak diffuse sources, depending on the space weather during the observation. In particular, SWCX events caused by interplanetary coronal mass ejections (ICMEs) tend to be spectrally rich and to provide critical information about the metal abundance in the ICME plasma. We analyzed the SN1006 background data observed with Suzaku on 2005 September 11 shortly after an X6-class solar flare, signatures of which were separately detected together with an associated ICME. We found that the data include emission lines from a variety of highly ionized ions generated through SWCX. The relative abundances of the detected ions were found to be consistent with those in past ICME-driven SWCX events. Thus, we conclude that this event was ICME driven. In addition, we detected a sulfur xvi line for the first time as one from an SWCX emission, which suggests that it is the most spectrally rich SWCX event ever observed. We suggest that observations of ICME-driven SWCX events can provide a unique probe to study the population of highly ionized ions in the plasma, which is difficult to measure in currently available in situ observations.

中文翻译：

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Suzaku 探测来自行星际日冕物质抛射中各种高度电离离子的太阳风电荷交换发射

众所周知，通过太阳风电荷交换 (SWCX) 产生的 X 射线发射会污染 X 射线观测数据，其数量通常很大甚至占主导地位，尤其是在软 X 射线波段，当主要目标包括相对较弱的漫射源，取决于观测期间的空间天气。特别是，由行星际日冕物质抛射 (ICME) 引起的 SWCX 事件往往具有丰富的光谱，并提供有关 ICME 等离子体中金属丰度的关键信息。我们分析了 2005 年 9 月 11 日在 X6 级太阳耀斑后不久用朱雀观测到的 SN1006 背景数据，其特征与相关的 ICME 一起被单独检测到。我们发现数据包括通过 SWCX 产生的各种高度电离离子的发射线。发现检测到的离子的相对丰度与过去 ICME 驱动的 SWCX 事件中的相对丰度一致。因此，我们得出结论，该事件是 ICME 驱动的。此外，我们首次从 SWCX 发射中检测到硫 xvi 线，这表明它是迄今为止观察到的光谱最丰富的 SWCX 事件。我们建议，对 ICME 驱动的 SWCX 事件的观察可以提供一个独特的探针来研究等离子体中高度电离的离子群，这在目前可用的原位观测中很难测量。这表明它是有史以来观测到的光谱最丰富的 SWCX 事件。我们建议，对 ICME 驱动的 SWCX 事件的观察可以提供一个独特的探针来研究等离子体中高度电离的离子群，这在目前可用的原位观测中很难测量。这表明它是有史以来观测到的光谱最丰富的 SWCX 事件。我们建议，对 ICME 驱动的 SWCX 事件的观察可以提供一个独特的探针来研究等离子体中高度电离的离子群，这在目前可用的原位观测中很难测量。