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- W2047982852 abstract "The conditions for maintenance of supernova-driven galactic winds have been investigated to assess their role in the morphology of disk-bulge galaxies. A fluid mechanical model with gas and stars which includes galactic rotation has been 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 conditon most easily satisfied by systems with a small bulge-to-disk ratio. If the ratio of supernova heating to total mass loss 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 was depleted of gas may support a bulge wind that does not interact with the colder and denser gas in the disk.These results indicate that if SO galaxies are a transition class between elliptical and spiral galaxies, it is probably because early galactic winds, which may initially deplete a galaxy of gas, are more prevalent in SO than in spiral galaxies. However, if SO's form a parallel sequence with spirals, the initial gas-depletion mechanism must be independent of bulge-to-disk ratio. Thesemore » results are not strongly influenced by altering the galactic mass model, including electron conduction in the flow equations, or adding massive halos.« less" @default.
- W2047982852 created "2016-06-24" @default.
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- W2047982852 date "1978-09-01" @default.
- W2047982852 modified "2023-09-24" @default.
- W2047982852 title "Galactic winds and the Hubble sequence" @default.
- W2047982852 doi "https://doi.org/10.1086/156425" @default.
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