Constraining Mass Loss and Lifetimes of Low Mass, Low Metallicity AGB Stars
Date Issued
2015
Author(s)
Rosenfield, P.
•
Marigo, P.
•
•
Dalcanton, J. J.
•
Bressan, A.
•
•
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.
Coverage
Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time
All editors
Kerschbaum, F.; Wing, R. F.; Hron, J.
Volume
497
Start page
423
Conferenece
Why Galaxies Care About AGB Stars III
Conferenece place
Vienna
Conferenece date
July 28 - August 1, 2014
Issn Identifier
1050-3390
Ads BibCode
2015ASPC..497..423R
Rights
open.access
File(s)![Thumbnail Image]()
Loading...
Name
423.pdf
Description
pdf editoriale
Size
820.94 KB
Format
Adobe PDF
Checksum (MD5)
245ef21d65bf6feaaf56948a18f29e4f