CHIANTI -发射谱线的原子数据库。XI。用Hinode/EIS观察Fe VII、Fe VIII和Fe IX的EUV发射线
CHIANTI - An atomic database for emission lines. XI. EUV emission lines of Fe VII, Fe VIII and Fe IX observed by Hinode/EIS
摘要：
介绍了对Hinode卫星上的极紫外成像光谱仪观测到的Fe VII、Fe VIII和Fe IX发射谱线的详细研究。在170-212 A和246-292 A范围内的光谱显示了来自太阳过渡区上部（温度5.4 <= log T <= 5.9）的强烈增强的谱线，这使得可以进行许多新的谱线识别。Fe VII线与新的原子模型预测的比较揭示了新的等离子体诊断，但是理论和观测之间存在一些对密度和温度不敏感的发射线比率的分歧，这表明需要改进原子数据。Fe VIII的谱线比率也显示出与理论的差异，与192和198 A之间的谱线相比，强185.21和186.60谱线被低估了60- 80%。新发现的253.9和255.8之间的多重峰相对于185-198 A之间的谱线提供了极好的温度诊断机会，然而原子模型低估了这些谱线的强度3-6倍。在波长176.959和177.594处对Fe IX的两条新谱线进行了鉴别，而在186和200之间的另外七条谱线则被认为是Fe IX的谱线，但这些谱线不能进行跃迁鉴别。Fe VII和Fe IX的新原子数据被证明可以显著修改TRACE 195 A成像通道的响应函数模型，从而影响该通道的温度测定。这些数据还将影响其他太阳极紫外成像仪器的响应功能，如SOHO/EIT，STEREO/EUVI和太阳动力学观测台即将推出的AIA仪器。
英文摘要：
A detailed study of emission lines from Fe VII, Fe VIII and Fe IX observed by the EUV Imaging Spectrometer on board the Hinode satellite is presented. Spectra in the ranges 170-212 A and 246-292 A show strongly enhanced lines from the upper solar transition region (temperatures 5.4 <= log T <= 5.9) allowing a number of new line identifications to be made. Comparisons of Fe VII lines with predictions from a new atomic model reveal new plasma diagnostics, however there are a number of disagreements between theory and observation for emission line ratios insensitive to density and temperature, suggesting improved atomic data are required. Line ratios for Fe VIII also show discrepancies with theory, with the strong 185.21 and 186.60 lines under-estimated by 60-80 % compared to lines between 192 and 198 A. A newly-identified multiplet between 253.9 and 255.8 A offers excellent temperature diagnostic opportunities relative to the lines between 185-198 A, however the atomic model under-estimates the strength of these lines by factors 3-6. Two new line identifications are made for Fe IX at wavelengths 176.959 A and 177.594 A, while seven other lines between 186 and 200 A are suggested to be due to Fe IX but for which transition identifications can not be made. The new atomic data for Fe VII and Fe IX are demonstrated to significantly modify models for the response function of the TRACE 195 A imaging channel, affecting temperature determinations from this channel. The data will also affect the response functions for other solar EUV imaging instruments such as SOHO/EIT, STEREO/EUVI and the upcoming AIA instrument on the Solar Dynamics Observatory.
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