Galactic Winds and the Hubble Sequence.
Abstract
The conditions for maintenance of supernova-driven winds was investigated to assess their role in the morphology of disk-bulge galaxies. A fluid mechanical model with gas and stars and which includes galactic rotation was used to investigate several classes of winds. It is found that many galaxies, once their initial gas is depleted, can maintain a wind throughout the entire galaxy, a condition most easily satisfied by systems with a small bulge-to-disk ratio. If the ratio of supernova heating to total mass falls below a critical value that depends on galaxy type and mass, only a partial wind exterior to a critical surface can exist, with infall occurring at interior points. Galaxies in which only the bulge is depleted of gas may support a bulge wind that does not interact with the colder and denser gas in the disk.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1977
- Bibcode:
- 1977PhDT........14B
- Keywords:
-
- Physics: Astronomy and Astrophysics;
- Galactic Radiation;
- Galactic Rotation;
- Hubble Diagram;
- Stellar Winds;
- Fluid Mechanics;
- Galactic Evolution;
- Galaxies;
- Morphology;
- Supernovae;
- Astrophysics