碟震波纹模式的铁谱线变化
Iron Line Variability of Discoseismic Corrugation Modes
摘要：
使用快速半解析射线追踪代码，我们研究了相对论加宽的铁线的变化，由于discoseismic振荡集中在最内区域的吸积盘周围的黑洞。由于其固有频率与低自旋低频准周期振荡（LQPO）的约0.1- 15 Hz范围很好地对应，因此特别感兴趣的是LQPO模式。振荡相位相关的可变性和QPO相位叠加的铁线观测的比较将允许这样的discoseismic模型被确认或排除作为一个源的特定LIPPO。如果用足够的时间和光谱分辨率观测，由于电磁模式引起的铁谱线的变化的光谱范围和频率也可以潜在地用于约束黑洞的自旋。
英文摘要：
Using a fast semi-analytic raytracing code, we study the variability of relativistically broadened iron lines due to discoseismic oscillations concentrated in the inner-most regions of accretion discs around black holes. The corrugation mode, or c-mode, is of particular interest as its natural frequency corresponds well to the ~0.1-15Hz range observed for low-frequency quasi-periodic oscillations (LFQPOs) for lower spins. Comparison of the oscillation phase dependent variability and QPO-phase stacked iron line observations will allow such discoseismic models to be confirmed or ruled out as a source of particular LFQPOs. The spectral range and frequency of the variability of the iron line due to corrugation modes can also potentially be used to constrain the black hole spin if observed with sufficient temporal and spectral resolution.
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