论文标题
冠状密度和温度曲线通过SDO/AIA观察到的前向建模EUV发射计算得出
Coronal Density and Temperature Profiles Calculated by Forward Modeling EUV Emission Observed by SDO/AIA
论文作者
论文摘要
我们提出了一个模型，用于血浆气氛的光学薄EUV发射强度。我们使用SDO/AIA仪器的六个光学薄的EUV通道，将模型应用于太阳电晕。血浆的发射率是使用基安蒂表根据密度和温度计算得出的，然后通过沿视线的整合来确定强度。我们考虑了径向密度和温度曲线的几种不同的曲线，每种曲线都受到无观察数据的约束，没有进一步的物理假设。我们首先将其应用于电晕的安静区域，然后将其用作包括冠状孔在内的模型的背景组件，从而允许孔内外的血浆密度和温度估算。我们将结果与差分排放度量（DEM）反转进行比较。对冠状密度和温度曲线的更准确的估计值可能有助于限制等离子体特性，例如与地震学等方法结合使用时的磁场强度。
We present a model for the intensity of optically thin EUV emission for a plasma atmosphere. We apply our model to the solar corona as observed using the six optically thin EUV channels of the SDO/AIA instrument. The emissivity of the plasma is calculated from the density and temperature using CHIANTI tables and the intensity is then determined by integration along the line of sight. We consider several different profiles for the radial density and temperature profiles, each of which are constrained by the observational data alone with no further physical assumptions. We demonstrate the method first by applying it to a quiet region of the corona, and then use it as the background component of a model including coronal holes, allowing the plasma densities and temperatures inside and outside the hole to be estimated. We compare our results with differential emission measure (DEM) inversions. More accurate estimates for the coronal density and temperature profiles have the potential to help constrain plasma properties such as the magnetic field strength when used in combination with methods such as seismology.
