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| Paper: |
Thin discs and dense bulges - What do they tell us about galaxies? |
| Volume: |
10, Evolution of the Universe of Galaxies: Edwin Hubble Centennial Symposium |
| Page: |
25 |
| Authors: |
Ostriker, Jeremiah P. |
| Abstract: |
Two basic facts about galaxies, the high density of the bulges and the thinness of the disks, are analyzed dynamically with the following conclusions: (1) the mass added in stellar lumps after the formation of the major part of the disks is less than 3 percent of the Galactic mass, and (2) spiral bulges are not made from mergers of bulgeless spirals, i.e., not made out of disk material. |
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