Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-07-22
Astrophys.J.692:1013-1032,2009
Astronomy and Astrophysics
Astrophysics
53 pages, including 6 figures and 5 tables. Revised and accepted for publications in ApJ
Scientific paper
10.1088/0004-637X/692/2/1013
Using the most recent results about white dwarfs in 10 open clusters, we revisit semi-empirical estimates of the initial-final mass relation in star clusters, with emphasis on the use of stellar evolution models. We discuss the influence of these models on each step of the derivation. One intention of our work is to use consistent sets of calculations both for the isochrones and the white dwarf cooling tracks. The second one is to derive the range of systematic errors arising from stellar evolution theory. This is achieved by using different sources for the stellar models and by varying physical assumptions and input data. We find that systematic errors, including the determination of the cluster age, are dominating the initial mass values, while observational uncertainties influence the final mass primarily. After having determined the systematic errors, the initial-final mass relation allows us finally to draw conclusions about the physics of the stellar models, in particular about convective overshooting.
Bertolami Marcelo Miller
Salaris Maurizio
Serenelli Aldo
Weiss Alexander
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