标题： 微类星体中的俘获盘振荡与稳定准周期振荡 (QPOs) 显示英文标题

标题： Trapped Disk Oscillations and Stable QPOs in Microquasars

摘要： 低质量X射线双星中观测到的拟周期振荡(QPOs) 被认为可能与相对论吸积盘内部的特征振动模式有关。 本文研究了这些振动模式的捕获特性，考虑了径向扰动和粘滞效应。 我们发现，当粘滞参数增加时，捕获的振荡显著增强，并且当径向波数和马赫数变化时，捕获区域的大小也会发生变化。 我们的结果支持，两个银河系微类星体中发现的稳定的百赫兹QPOs及其较低的分数均方根幅度，可以通过旋转黑洞周围吸积盘内部的一些捕获非阻尼振动模式来解释。 显示英文摘要

摘要： The observed quasi-periodic oscillations (QPOs) in low-mass X-ray binaries have been suggested to be probably related to the characteristic oscillation modes in the inner part of a relativistic accretion disk. In this paper we study the trapped feature of these oscillation modes by considering the radial perturbations and viscosity effects. We find that the trapped oscillations are amplified significantly when the viscosity parameter increases and the trapped size varies when the radial wavenumber and Mach number change. Our results support that the stable hundred-hertz QPOs and their low fractional rms amplitudes found in two Galactic microquasars may be explained by some trapped non-damping oscillation modes in the inner part of accretion disks around rotating black holes.