差分发射测量能限制能量沉积的时间尺度吗
Can the Differential Emission Measure constrain the timescale of energy deposition
摘要：
在本文中，Hinode/EIS仪器探测日冕加热的辐射特征的能力进行了研究。最近对AR核心的观测研究表明，低频和高频加热机制与观测结果一致。区分这些可能性对于识别加热的物理机制是重要的。差分发射测量（DEM）工具是一种诊断工具，可以通过日冕峰冷端DEM斜率的幅度进行这种区分。因此，了解与这些测量相关的不确定性至关重要。使用适当的估计的不确定性所涉及的DEM反演的问题，我们得到的置信水平上观察到的DEM斜率。结果表明，在斜坡重建的不确定性强烈地依赖于约束的斜率线的数量。在更有利的情况下，典型的不确定性估计约为$\pm 1.0$。
英文摘要：
In this paper, the ability of the Hinode/EIS instrument to detect radiative signatures of coronal heating is investigated. Recent observational studies of AR cores suggest that both the low and high frequency heating mechanisms are consistent with observations. Distinguishing between these possibilities is important for identifying the physical mechanism(s) of the heating. The Differential Emission Measure (DEM) tool is one diagnostic that allows to make this distinction, through the amplitude of the DEM slope coolward of the coronal peak. It is therefore crucial to understand the uncertainties associated with these measurements. Using proper estimations of the uncertainties involved in the problem of DEM inversion, we derive confidence levels on the observed DEM slope. Results show that the uncertainty in the slope reconstruction strongly depends on the number of lines constraining the slope. Typical uncertainty is estimated to be about $\pm 1.0$, in the more favorable cases.
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