Tidal generation of active disc galaxies by rich clusters.
Abstract
The correlation of galactic activity with companion galaxies is investigated using computer models of tidally perturbed Seyfert galaxies. A self-gravitating 60,000 particle disk and inert 'halo' perturbed by a companion on a parabolic orbit is used in this study. Tidal perturbation of the disk throws gas clouds into nucleus-crossing orbits to fuel activity. The experiments demonstrate that the inflow rate exceeds the required value at perturbation levels matching those found by Dahari (1984), who found that more Seyferts (37 percent) have companions than do normal spirals (21 percent), and that Seyferts with companions are perturbed more strongly. It is therefore concluded that observed companions of Seyferts do have tidal fields sufficient to trigger activity.
- Publication:
-
Dynamics of Astrophysical Discs
- Pub Date:
- 1989
- DOI:
- 10.1017/CBO9780511564772.056
- Bibcode:
- 1989dad..conf..213B
- Keywords:
-
- Disk Galaxies;
- Galactic Clusters;
- Galactic Evolution;
- Galactic Mass;
- Interacting Galaxies;
- Seyfert Galaxies;
- Galactic Structure;
- Interstellar Gas;
- Perturbation Theory;
- Red Shift;
- Spiral Galaxies;
- Astrophysics;
- Active Galaxies: Tidal Effects;
- Active Galaxies: Clusters of Galaxies