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Diagnostics of Active Region Loops Observed with Hinode/EIS

机译：Hinode / EIS观察有源区域环路的诊断

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The Extreme Ultraviolet Imaging Spectrometer (EIS) on board Hinode provides us with an excellent opportunity to study the physical parame-ters in spatially resolved corona] structures. In this paper we have carried out a study of active region loops using observations from the EIS. The active region was observed on 2007 Ma 19 using the 1" slit of EIS. At corona' temperatures, we find that electron densities measured from Fe XII and Si X line ratios de-crease along the loop length. being 1010 cm-3 at foot point and 108 cm-3 at a height of about 75 Mm. However, the electron densities measured from the Mg VII line ratios (at a transition region temperature) show significantly lower values at the foot point. The electron temperature along the loop increases with height from ≈ 0.8 MK (at foot point) to ≈ 1.5 MK (at a height of 75 Mm). The temperature diagnostics using EM-loci at different locations along the loop show that the loop is "nearly isothermal" or "mildly multi-thermal" along the LOS. These measurements provide important constraints on the theoretical modelling of coronal loops.
机译：Hinode上的极端紫外线成像光谱仪（EIS）为我们提供了在空间解决的电晕结构中研究物理比例的绝佳机会。在本文中，我们使用EIS的观测进行了对有源区环的研究。在2007 mA 19上观察到活性区域，使用1“eis狭缝。在电晕的温度下，我们发现从Fe XII和Si x线比测量的电子密度沿着环长度脱折痕。是1010 cm-3脚点和108cm-3的高度约为75毫米。然而，从Mg VII线比率（在过渡区域温度）测量的电子密度在脚点处显示出显着较低的值。沿环的电子温度增加高度从≈0.8mk（在脚点）到≈1.5mk（高度为75 mm）。使用EM-LOCI在沿着循环的不同位置使用EM-LOCI的温度诊断表明环是“几乎是等温”或“轻度多 - 沿LOS的热“。这些测量在冠状环的理论建模上提供了重要的限制。

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