高频准周期振荡的点模型与环面模型的区别
Distinguishing between spot and torus models of high-frequency quasiperiodic oscillations
摘要：
在高频准周期振荡（HF QPOs）的背景下，我们进一步探讨了一个可观测的信号产生的热点沿准椭圆轨道接近最内层的稳定圆轨道在史瓦西时空的外观。我们的调查的目的是揭示傅立叶功率谱密度的可观察到的特征是否可以帮助我们区分两个竞争模型，即，在吸积环表面上运行的亮点的想法与环本身的固有振荡的情况。我们考虑到目前的天文台（由罗西X射线定时探测器，RXTE代表）的能力，我们还考虑了拟议的未来仪器（由大型天文台X射线定时，LOFT代表）。
英文摘要：
In the context of high-frequency quasi-periodic oscillation (HF QPOs) we further explore the appearance of an observable signal generated by hot spots moving along quasi-elliptic trajectories close to the innermost stable circular orbit in the Schwarzschild spacetime. The aim of our investigation is to reveal whether observable characteristics of the Fourier power-spectral density can help us to distinguish between the two competing models, namely, the idea of bright spots orbiting on the surface of an accretion torus versus the scenario of intrinsic oscillations of the torus itself. We take the capabilities of the present observatories (represented by the Rossi X-ray Timing Explorer, RXTE) into account, and we also consider the proposed future instruments (represented here by the Large Observatory for X-ray Timing, LOFT).
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