Constraining Mass Loss and Lifetimes of Low Mass, Low Metallicity AGB Stars
- Author(s)
- P. Rosenfield, Paola Marigo, Leo Girardi, J. J. Dalcanton, Alessandro Bressan, Bernhard Aringer
- 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.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- University of Padova, Osservatorio Astronomico
- Pages
- 423 - 428
- Publication date
- 08-2015
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/constraining-mass-loss-and-lifetimes-of-low-mass-low-metallicity-agb-stars(140bae83-02df-42ec-90ad-0166b08a530f).html