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| Paper: |
Measuring the Mass-Loss Evolution at the Tip of the
Asymptotic Giant Branch |
| Volume: |
445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants |
| Page: |
371 |
| Authors: |
Sandin, C. |
| Abstract: |
Planetary nebulae (PNe) form in the remains of the final stages
of mass loss on the preceding asymptotic giant branch (AGB).
In order to improve our understanding of stellar evolution,
galactic chemical evolution, and the formation and evolution
of PNe, it is important to measure the massive winds at the tip
of the AGB. Here I present important concepts of our unique approach
to measuring the AGB mass-loss evolution – using observations of
faint halos around PNe – and relate it to the other methods that
are in use. Both densities and kinematics can hereby be measured
for several thousand of years of evolution. The gas is measured
directly, so that supplementary models and assumptions are
unnecessary. |
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