Semi-empirical white dwarf initial-final mass relationships: a thorough analysis of systematic uncertainties due to stellar evolution models

TL;DR

This paper revisits the initial-final mass relation for white dwarfs using recent cluster data, emphasizing the impact of stellar evolution models and systematic uncertainties on the relation.

Contribution

It provides a comprehensive analysis of how different stellar evolution models and assumptions affect the initial-final mass relation and its systematic errors.

Findings

Systematic errors dominate initial mass estimates.

Observational uncertainties mainly affect final mass.

The study constrains stellar physics, especially convective overshooting.

Abstract

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.