A large stellar evolution database for population synthesis studies: VI. White dwarf cooling sequences

Abstract

We present a new set of cooling models and isochrones for both H- and He-atmosphere white dwarfs, incorporating accurate boundary conditions from detailed model atmosphere calculations, and carbon-oxygen chemical abundance profiles based on updated stellar evolution calculations from the BaSTI stellar evolution archive - a theoretical data center for the Virtual Observatory. We discuss and quantify the uncertainties in the cooling times predicted by the models, arising from the treatment of mixing during the central H- and He-burning phases, number of thermal pulses experienced by the progenitors, progenitor metallicity and the ${}^{12}C(\alpha ,\gamma {)}^{16}O$ reaction rate. The largest sources of uncertainty turn out to be related to the treatment of convection during the last stages of the progenitor central He-burning phase, and the ${}^{12}C(\alpha ,\gamma {)}^{16}O$ reaction rate. We compare our new models to previous calculations performed with the same stellar evolution code, and discuss their application to the estimate of the age of the solar neighborhood, and the interpretation of the observed number ratios between H- and He-atmosphere white dwarfs. The new white dwarf sequences and an extensive set of white dwarf isochrones that cover a large range of ages and progenitor metallicities are made publicly available at the official BaSTI website.

34 pages, 13 figures, The Astrophysical Journal, in press

References in corpus (20)

• A large stellar evolution database for population synthesis studies. I. Scaled solar models and isochrones
• A large stellar evolution database for population synthesis studies. II. Stellar models and isochrones for an alpha-enhanced metal distribution
• Accretion and diffusion in white dwarfs. New diffusion timescales and applications to GD362 and G29-38
• Found: The missing blue opacity in atmosphere models of cool hydrogen white dwarfs
• The initial-final mass relationship of white dwarfs revisited: effect on the luminosity function and mass distribution
• The White Dwarf Cooling Sequence of NGC6397
• The white dwarf cooling sequence in NGC 6791
• Semi-empirical white dwarf initial-final mass relationships: a thorough analysis of systematic uncertainties due to stellar evolution models
• A large stellar evolution database for population synthesis studies. V. Stellar models and isochrones with CNONa abundance anticorrelations
• A Large Stellar Evolution Database for Population Synthesis Studies. III. Inclusion of the full Asymptotic Giant Branch phase and Web tools for stellar population analyses
• Reaching the End of the White Dwarf Cooling Sequence in NGC 6791
• The End of the White Dwarf Cooling Sequence in M4: an efficient approach
• A large stellar evolution database for population synthesis studies. IV. Integrated properties and spectra
• The Ratio of Helium- to Hydrogen-Atmosphere White Dwarfs: Direct Evidence for Convective Mixing
• Evolution and colors of helium-core white dwarf stars with high-metallicity progenitors
• From Young and Hot to Old and Cold: Comparing White Dwarf Cooling Theory to Main Sequence Stellar Evolution in Open Clusters
• The bottom of the white dwarf cooling sequence in the old open cluster NGC 2158
• On the Dissociation Equilibrium of H2 in Very Cool, Helium-Rich White Dwarf Atmospheres
• White dwarf atmosphere models with Ly-$\alpha$ opacity in the analysis of the white dwarf cooling sequence of NGC 6397
• The Pseudo-continuum Bound-free Opacity of Hydrogen and its Importance in Cool White Dwarf Atmospheres

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