Amplification of spiral density waves in gaseous and dust galactic disks as a result of interaction with the halo |
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| Authors: | V A Antonov A S Baranov |
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| Institution: | (1) Pulkovo Astronomical Observatory, Russian Academy of Sciences, Pulkovskoe sh. 65, St. Petersburg, 196140, Russia |
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| Abstract: | The effect of the discrete structure of the halo on local oscillations of a galactic disk is analyzed. Such effects have much in common with dynamical friction. Gaseous and stellar disks are considered; in both cases, some leading spiral density waves are unstable. Bending oscillations of the disk can also be unstable when the disk interacts with the halo. |
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