@techreport{oai:nifs-repository.repo.nii.ac.jp:00010396, author = {Watanabe, T. -H and Sato, T.}, month = {Jul}, note = {Starting from the ideal magnetohydrodynamic and two-fluid equations, the linear analysis of the feedback instability has been made in a coupled system of perfectly and partially ionized plasmas The obtained eigenfunction and frequency of the unstable mode are qualitatively consistent with observations of auroral arcs.}, title = {Magnetohydrodynamic Approach to the Feedback Instability}, year = {1997} }