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Trapped Disk Oscillations and Stable QPOs in Microquasars | | Xue-Bing Wu
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1 Nov 2000 | | Journal: | Astrophys.Space Sci. 276 (2001) 161-164 | | Subject: | astro-ph | | Affiliation: | MPA & Beijing Observatory | | Abstract: | 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. | | Source: | arXiv, astro-ph/0011009 | | Other source: | [GID 768000] astro-ph/0011009 | | Services: | Forum | Review | PDF | Favorites | |
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