论文标题
微氧计时ERA II中的X射线光谱：从h-和he样铁中的a a到b过渡的圆柱密度的新诊断
X-ray spectroscopy in the microcalorimeter era II: A new Diagnostic on Column Density from the Case A to B Transition in H- and He-like Iron
论文作者
论文摘要
板上\ textit {hitomi}上的软X射线光谱仪（SXS），并具有前所未有的R $ \ sim $ 1250的分辨能力，允许从Perseus Cluster的中心发现Fe XXV \ ka \ ka \复杂发射光谱的成员。在本文中，我们介绍了一种新的方法，该方法使用光学薄（情况A）测量柱密度，以对一单电子系统和两电子系统的光学厚（情况B）转变。我们使用来自不同原子数据集中的碰撞强度的\ textit {hitomi}观测值比较了用多云计算的Fe xxv k $α$线比进行比较。我们还显示了湍流对Fe XXV K $α$线比的影响以及色谱柱密度和金属性之间的相互作用。此外，我们讨论了允许和不允许的过渡的过渡概率的原子数依赖性，这导致高度充电的HE样系统（例如Fe XXV）与HeI的行为根本不同。
The Soft X-ray Spectrometer (SXS) on board \textit{Hitomi}, with the unprecedented resolving power of R$\sim$1250, allowed the detection of members of the Fe XXV \ka\ complex emission spectra from the center of the Perseus Cluster. In this paper, we introduce a novel method of measuring the column density using the optically thin (Case A) to optically thick (Case B) transition for one- and two-electron systems. We compare the Fe XXV K$α$ line ratios computed with CLOUDY with that from the \textit{Hitomi} observations in the outer region of the Perseus core using collision strengths from different atomic datasets, and obtain good agreement. We also show the effect of turbulence on Fe XXV K$α$ line ratios and interplay between column density and metallicity. Besides, we discuss the atomic number dependence of transition probabilities for allowed and non-allowed transitions, which causes the highly charged He-like systems, such as Fe XXV, to behave fundamentally differently from He I.
