We have simulated a series of N-body models of tidal encounters between a disk galaxy and a perturbing galaxy to investigate the dynamical properties of tidally-induced galactic bars (Noguchi 1987, MNRAS, 228, 635). We have also calculated N-body models on isolated galaxies with bar-unstable disks (Ostriker & Peebles 1973, ApJ, 186, 467) to make a comparison between galactic bars of different origins (Miwa & Noguchi 1997, submitted).
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