The stability of an isothermal,magnetized and causally limited viscosity accretion disk |
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| Authors: | Lantian Yang Shaoping Wu Xuebing Wu Dazhi Wang |
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| Institution: | (1) Institute of Astrophysics, Huazhong Normal University, 430070 Wuhan, P.R. China;(2) Beijing Astronomical Observatory, Academia Sinica, 100080 Beijing, P.R. China;(3) Department of Fundamental Science, Gezhouba Institute of Water Electric power, Yichang, P.R. China |
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| Abstract: | The stability of an isothermal, magnetized and causally limited viscosity accretion disk is examined in this paper. We find that the viscous modes are always stable throughout the disk, and the magneto-acoustic modes are pulsationally unstable. The results show that the Mach numbers do effect the instabilities of the disk and the magnetic field enhances the instability property of the radial oscillation. Our results are useful for understanding the time variations of AGN. |
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