论文标题
颜色图作为评估高质量X射线二进制可变吸收的工具
Color-color diagrams as tools for assessment of the variable absorption in high mass X-ray binaries
论文作者
论文摘要
高质量X射线二进制文件有望通过使用紧凑型物体的发射作为背光来评估结构化恒星风中的可变吸收。沿着视线的风在时间尺度上可能会在短达几分钟及以下变化。然而，这种短时间不可用来通过X射线光谱与当前一代的X射线望远镜直接测量吸收。在本文中，我们证明了颜色图的可用性，以评估高质量X射线二进制系统的风能吸收。我们采用部分覆盖模型来描述高质量X射线二进制文件的光谱形状，并评估不同吸收剂的含义及其对颜色轨道形状的变异性。我们表明，考虑到吸收剂的电离，特别是考虑到吸收深度的电离变化，对于很好地描述观察到的行为至关重要。
High mass X-ray binaries hold the promise of giving us understanding of the structure of the winds of their supermassive companion stars by using the emission from the compact object as a backlight to evaluate the variable absorption in the structured stellar wind. The wind along the line of sight can change on timescales as short as minutes and below. However, such short timescales are not available to direct measurement of absorption through X-ray spectroscopy with the current generation of X-ray telescopes. In this paper, we demonstrate the usability of color-color diagrams for assessing the variable absorption in wind accreting high mass X-ray binary systems. We employ partial covering models to describe the spectral shape of high mass X-ray binaries and assess the implication of different absorbers and their variability on the shape of color-color tracks. We show that taking into account the ionization of the absorber, and in particular accounting for the variation of ionization with absorption depth, is crucial to describe the observed behavior well.
