论文标题
安静和活跃的太阳能电晕中的温度和排放量度分布：贝叶斯方法
The temperature and emission measure distribution in the quiet and active solar corona: a Bayesian approach
论文作者
论文摘要
从光谱线强度观察的差分排放度量（DEM）的重建提供了有关观察到的区域中排放度量的温度分布的信息。已知反转过程是高度不稳定的，有必要提供其他约束，例如要求DEM应该平稳。但是，这是一个非物理约束。该分析的目的是对一组发射线强度约束重建的能力进行经验确定。在这里，通过蒙特卡洛 - 马尔科夫链工艺使用了一个简单的模型，以获得溶液，该溶液在安静的太阳和太阳活动区域的区域中可重现观察到的强度。通过减少的卡方比较这些溶液。该分析的结论是，观测值仅能够约束由4个温度排放度量对组成的模型，并确定模型与观察到的线强度的标准偏差。具有5个温度排放测量对的更复杂的模型并不能改善拟合度，并导致无关紧要的参数。一个更一般的结论是，相对于确定排放量度分布的一组观察到的排放线的信息含量受到限制。
The reconstruction of the differential emission measure (DEM) from observations of spectral line intensities provides information on the temperature distribution of the emission measure in the region observed. The inversion process is known to be highly unstable and it has been necessary to provide additional constraints, such as requiring that the DEM should be smooth. However, this is a non-physical constraint. The goal of this analysis is to make an empirical determination of the ability of a set of emission line intensities to constrain the reconstruction. Here, a simple model is used, by means of a Monte-Carlo-Markov-Chain process, to arrive at solutions that reproduces the observed intensities in a region of the quiet Sun and a solar active region. These solutions are compared by means of the reduced chi-squared. The conclusion from this analysis is that the observations are only capable of constraining model consisting of 4 temperature-emission measure pairs plus a determination of the standard deviation of the model from the observed line intensities. A more complex model with 5 temperature-emission measure pairs does not improve the fit and leads to parameters that are irrelevant. A more general conclusion is that the information content of a set of observed emission lines is limited with respect to the determination of the emission measure distribution.
