PLASMA INSTABILITY AT THE INNER EDGE OF THE ACCRETION DISK .2.

A two-dimensional instability analysis for a magneto-keplerian disk fl ow around a compact object is presented here. Using the eigenvalue tec hnique, linearly coupled perturbed equations have been numerically sol ved within the local approximation. It is concluded that Kelvin-Helmho ltz, magnetosonic (fast and slow) and resistive electromagnetic modes exist. However, only the magnetosonic mode can destabilise the disk st ructure. Further, we discuss the properties of different modes as a fu nction of disk parameters and plot the eigenmode structures for differ ent physical quantities.