标题： 下一代吸积盘反射模型：高密度等离子体效应 显示英文标题

标题： Next Generation Accretion Disk Reflection Model: High-Density Plasma Effects

摘要： 围绕黑洞的发光吸积盘预计具有密度为$\sim 10^{15-22}\,$厘米$^{-3}$的物质，这一密度足够高以至于等离子体物理效应变得重要。 这些效应传统上在原子参数计算以及由此推导出的光致电离模型中被忽略，最终也影响了X射线反射模型。 本文描述了XSTAR代码所用原子速率的更新，而XSTAR代码本身是XILLVER盘反射模型的一部分。 我们讨论了在XILLVER代码中加入必要的高密度修正的效果。 具体来说，我们发现复合速率的变化起着重要作用，主导了不同版本模型之间的差异。 通过合成光谱，我们展示了即使处于高度电离状态，高密度薄片也能产生强烈的铁（$\sim$6.5-9$\,$千电子伏特）和氧（$\sim0.6-0.8\,$千电子伏特）共振特征。 显著的铁发射可能有助于解决某些源中发现的超太阳铁丰度的问题。 显示英文摘要

摘要： Luminous accretion disks around black holes are expected to have densities of $\sim 10^{15-22}\,$cm$^{-3}$, which are high enough such that plasma physics effects become important. Many of these effects have been traditionally neglected in the calculation of atomic parameters, and therefore from photoionization models, and ultimately also from X-ray reflection models. In this paper, we describe updates to the atomic rates used by the XSTAR code, which is in turn part of the XILLVER disk reflection model. We discuss the effect of adding necessary high density corrections into the XILLVER code. Specifically, we find that the change of recombination rates play an important role, dominating the differences between model versions. With synthetic spectra, we show that even in a highly ionized state, high density slabs can produce strong iron ($\sim$6.5-9$\,$keV) and oxygen ($\sim0.6-0.8\,$keV) resonance features. The significant iron emission could address the problem of the supersolar iron abundances found in some sources.