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| Paper: |
Bipolar outflows - Evolutionary and global considerations |
| Volume: |
12, The Evolution of the Interstellar Medium |
| Page: |
183 |
| Authors: |
Rodriguez, Luis F. |
| Abstract: |
The paper discusses three key issues related to bipolar outflows in molecular clouds in the context of a review of bipolar-outflow surveys. Three main issues are considered: (1) the ubiquity of the stellar outflow phase; (2) the appearance of the outflow phase in the stellar evolutionary sequence; and (3) the contribution of the outflows to the turbulence in molecular clouds. Data regarding the duration of the outflow phase and the number of observable outflows within 1 kpc from the sun suggest that all stars go through the outflow phase. The phase appears to be the first in stellar evolution, although a pure infall phase can replace it as the first, if discovered. If the dissipation time for turbulence is longer than is presently assumed, the observed turbulence can be explained by the injection of momentum in the clouds by the outflows. |
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