| タイトル | Dynamics of a stellar bar |
| 著者（英） | Miller, R. H.; Smith, B. F. |
| 著者所属（英） | NASA Ames Research Center|Chicago Univ. |
| 発行日 | 1979-02-01 |
| 言語 | eng |
| 内容記述 | The dynamical properties of a prolate bar have been studied by means of a three-dimensional computer model. The bar pattern rotates in the sense of the total angular momentum. The mean particle motion is a rapid streaming in the direction of pattern rotation as seen from a frame that rotates with the bar. Rotation rates that would be inferred from observation are significantly (2-3 times) faster than the pattern rotation speed. Velocity dispersions are anisotropic with the largest component along the bar. Particles oscillate in the bar potential significantly faster than pattern rotation. About 25% of the star orbits are near 2:2:1 resonance with the slow motion along the bar. Particle motion is highly ordered in the bar. Observable properties are described; where comparisons can be made, observable properties are in agreement with observations of brightness contours, velocity fields, and velocity dispersions. The bar has nearly exponential density profiles. |
| NASA分類 | ASTROPHYSICS |
| レポートNO | 79A23909 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/428387 |
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