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| Paper: |
Constraining Mass Loss and Lifetimes of Low Mass, Low
Metallicity AGB Stars |
| Volume: |
497, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time |
| Page: |
423 |
| Authors: |
Rosenfield, P.; Marigo, P.; Girardi, L.; Dalcanton, J. J.; Bressan, A.; Gullieuszik, M.; Weisz, D. R.; Williams, B. F.; Dolphin, A.; Aringer, B. |
| Abstract: |
The evolution and lifetimes of thermally pulsing asymptotic giant branch
(TP-AGB) stars suffer from significant uncertainties. We present a
detailed framework for constraining model luminosity functions of TP-AGB
stars using resolved stellar populations. We show an example of this
method that compares various TP-AGB mass-loss prescriptions that differ
in their treatments of mass loss before the onset of dust-driven winds
(pre-dust). We find that models with more efficient pre-dust driven mass
loss produce results consistent with observations, as opposed to more
canonical mass-loss models. Efficient pre-dust driven mass-loss predicts,
for [Fe/H] ≲ –1.2, that lower mass TP-AGB stars
(M≲ 1 M☉) must have lifetimes less than about 1.2 Myr. |
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