The Radial-Azimut ha1 Inst ability of an Isothermal Magnetized Accretion Disk |
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| Authors: | YANG Lantian WU Shaoping LU Ye WU Xuebing |
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| Institution: | 1. Institute of Astrophysics, Huazhong Normal University, Wuhan 430070, China;
2. institute of Theoretical Physics, The Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | The radial-azimuthal instability of an isothermal magnetized accretion disk is examined in this paper. We find that the azimuthal perturbation enhances the instability of the magneto-acoustic and non-axisymmetric modes. The magnetic field induces and enhances the instability of magneto-acoustic modes, but stabilizes the non-axisymmetric modes in the outer disk. The viscous modes are always stable. The instability of magneto-acoustic modes are dominant in this disk. |
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| Keywords: | accretion disk radial-azimuthal instability |
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