论文标题
在肢体CMES产生的大规模冠状凹痕中观察到射线样结构
Observations of Ray-Like Structures in Large-Scale Coronal Dimmings Produced by Limb CMEs
论文作者
论文摘要
在174 \中掉落宽大望远镜的LIMB电晕的观察结果，ÅPassband在船上proba2 Mission提供了一个机会，可以在调度区域研究爆发后的过程。我们研究了2010年与肢体冠状质量弹出（CMES）相关的四个“深”脱皮冠状膜的形态，时间进化和等离子体特性。使用互换差异图像，我们揭示了类似射线的结构，这些结构出现在调光恢复阶段，从1.1到1.1 \，$ \ mathrm {r} _ {\ odot} $，并从数十分钟到几个小时。在1.7 \，$ \ mathrm {r} _ {\ odot} $的uvcs上方的soHo上，以上的距离以上是1.7 \，$ \ mathrm {r} _ {\ odot} $的距离。这些结构显然代表了Lasco-C2船上SOHO观察到的通量绳躯干的冠状根。立体声上的EUVI数据显示了圆盘上这些结构的起源，因为风扇射线在171 \，Å带中的亮度比193 \，Å中的亮度要明亮，这表明它们的温度小于2 \，MK。基于AIA多波长图像的差异排放度量（DEM）分析SDO上表明，与爆发前血浆状态相比，这些射线中的发射度量（EM）在0.6 \，0.6 \， - \，0.8 \，0.8 \，0.8 \，MK，em em em em em em em em em em em的温度下，高达45 \，\％。 1.3 \， - \，3.7 \，Mk掉落19 \， - \，43 \，\％。在2010年8月18日的活动中，板上立体声塑料仪器检测到CME尾部中的冷流的签名，富含离子Fe $^{8+} $ \， - \， - \，Fe $^{10+} $，可能与Solar Corona的次要射线相关联。
Observations of the off-limb corona with the SWAP wide-field telescope in the 174\,Å passband onboard the PROBA2 mission provide an opportunity to study post-eruptive processes in the dimming regions. We investigate morphology, temporal evolution, and plasma properties for four `deep' off-disk coronal dimmings associated with limb coronal mass ejections (CMEs) in 2010\,--\,2017. Using the SWAP fixed-difference images, we revealed ray-like structures that appeared in the dimming recovery phase stretching quasi-radially to distances from 1.1 to 1.6\,$\mathrm{R}_{\odot}$ and existing from tens of minutes to several hours. Similar rays were detected earlier at distances above 1.7\,$\mathrm{R}_{\odot}$ by the UVCS onboard the SOHO. These structures apparently represent the coronal roots of the flux rope trunks observed by the LASCO-C2 onboard SOHO. The EUVI data onboard the STEREO show the origins of these structures on the disc as fan rays much brighter in the 171\,Å band than in 193\,Å, which suggests their temperature being less than 2\,MK. The differential emission measure (DEM) analysis based on the AIA multi-wavelength images onboard the SDO showed that the emission measure (EM) in these rays compared to the pre-eruption plasma state increased up to 45\,\% at temperatures of 0.6\,--\,0.8\,MK, whereas EM of the ambient coronal plasma with temperatures of 1.3\,--\,3.7\,MK dropped by 19\,--\,43\,\%. For the event on 18 August 2010, the PLASTIC instrument onboard STEREO detected signatures of the cold streams in the CME tail as enriched with the ions Fe$^{8+}$\,--\,Fe$^{10+}$, which may be associated with the post-eruptive rays in the solar corona.
