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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Suzaku detection of enigmatic geocoronal solar wind charge exchange event associated with coronal mass ejection
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Suzaku detection of enigmatic geocoronal solar wind charge exchange event associated with coronal mass ejection

机译：苏崎检测与冠状大规模射出相关的神秘地理过度太阳风电荷交换事件

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Suzaku detected an enhancement of the soft X-ray background associated with solar eruptions on 2013 April 14-15. The solar eruptions were accompanied by an M6.5 solar flare and a coronal mass ejection with magnetic flux ropes. The enhanced soft X-ray background showed a slight variation over half a day and then a clear one in a few hours. The former spectrum was composed of oxygen emission lines, while the later one was characterized by a series of emission lines from highly ionized carbon to silicon. The soft X-ray enhancement originated from geocoronal solar wind charge exchange. However, there appeared to be no significant time correlation with the solar wind proton flux measured by the ACE and WIND satellites. From other solar wind signatures, we considered that an interplanetary shock associated with the coronal mass ejection and a turbulent sheath immediately behind the shock compressed the ambient solar wind ions and then resulted in the soft X-ray enhancement. Furthermore, the enriched emission lines were presumed to be due to an unusual set of ion abundances and ionization states within the coronal mass ejection. We found a better time correlation with the solar wind alpha flux rather than the solar wind proton flux. Our results suggest that the solar wind proton flux is not always a good indicator of geocoronal solar wind charge exchange, especially associated with coronal mass ejections. Instead, the solar wind alpha flux should be investigated when such a soft X-ray enhancement is detected in astronomical observations.
机译：Suzaku于2013年4月14日至15日检测到与太阳爆发相关的软X射线背景。太阳爆发伴随着M6.5太阳能火炬和磁通圆圈的冠状大气排出。增强的软X射线背景显示出半天半的差异，然后在几个小时内清晰。前光谱由氧气排放线组成，而后者的特征在于从高度电离碳的一系列发射线到硅。柔软的X射线增强源于地理典康太阳风电荷交换。然而，似乎与ACE和风卫星测量的太阳能质子通量没有显着的时间相关性。从其他太阳风签收中，我们认为与冠状大气射出相关的行星际冲击以及紧接在冲击后面的湍流护套压缩的环境太阳能风力离子，然后导致软X射线增强。此外，富集的排放线被推测为由于冠状大量喷射内的不寻常的离子丰度和电离状态。我们发现与太阳风α磁通而不是太阳风质子通量更好的时间相关性。我们的研究结果表明，太阳能质子磁通并不总是地理典的太阳能电荷交换的良好指标，尤其是与冠状大规模喷射相关。相反，当在天文观测中检测到这种软X射线增强时，应研究太阳风α磁通量。

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