On the relationship between lenses and inner rings in spiral galaxies
Abstract
In simulations of gas flow in the gravitational field of model barred galaxies, which have been described elsewhere, structures resembling inner rings have formed. The model rings encircle the bar as observed in real galaxies, but are more elongated than the average inner ring. In this paper it is shown that the addition of a lenslike component to the background field results in much rounder rings. Indeed the shape and position of the model rings are very sensitive to any steep gradients in the azimuthally averaged surface density near the ends of the bar.
- Publication:
-
Publications of the Astronomical Society of Australia
- Pub Date:
- 1985
- DOI:
- 10.1017/S1323358000018099
- Bibcode:
- 1985PASA....6..202S
- Keywords:
-
- Barred Galaxies;
- Galactic Structure;
- Ring Structures;
- Spiral Galaxies;
- Lenses;
- Morphology;
- Orbits;
- Perturbation;
- Astrophysics