The formation and evolution of hydrogen-deficient post-AGB white dwarfs: the emerging chemical profile and the expectations for the PG1159-DB-DQ evolutionary connection

Abstract

This paper is designed to explore the formation and evolution of hydrogen-deficient post-AGB white dwarfs. To this end, we compute the complete evolution of an initially 2.7 M_sun star from the zero-age main sequence through the thermally pulsing and mass-loss phases to the white dwarf stage. Particular attention is given to the chemical abundance changes during the whole evolution. A time-dependent scheme for the simultaneous treatment of abundance changes caused by nuclear reactions, diffusive overshooting, salt fingers and convection is considered. We employed the double-diffusive mixing-length theory of convection for fluids with composition gradients (Grossman & Taam 1996). The study can therefore be considered as a test of its performance in low-mass stars. Also, time-dependent element diffusion for multicomponent gases is taken into account during the white dwarf evolution. The evolutionary stages corresponding to the last helium thermal pulse on the early white-dwarf cooling branch and the following born-again episode are carefully explored. Relevant aspects for PG1159 stars and DB white dwarf evolution are studied in the frame of these new evolutionary models that take into account the history of the white dwarf progenitor. The scope of the calculations is extended to the domain of the helium-rich, carbon-contaminated DQ white dwarfs with the aim of exploring the plausibility of the evolutionary connection PG1159-DB-DQ. In this regard, the implications for the double-layered chemical structure in pulsating DB white dwarfs is investigated. Another aspect of the investigation concerned the consequences of mass-loss episodes during the PG1159 stage for the chemical stratification of the outer layer of DB and DQ white dwarfs.

20 pages, 15 figures. Accepted by Astronomy & Astrophysics

References in corpus (14)

• s-Process Nucleosynthesis in AGB Stars: A Test for Stellar Evolution
• The chemical composition of White Dwarfs as a test of convective efficiency during core He-burning
• Evolution on the AGB and beyond: On the formation of H-deficient post-AGB stars
• New evolutionary models for massive ZZ Ceti stars: I. First results for their pulsational properties
• A Strong Test of Electro-Weak Theory using Pulsating DB White Dwarf Stars as Plasmon Neutrino Detectors
• The evolutionary time scale of Sakurai's object: A test of convection theory?
• Thick to Thin: The Evolutionary Connection Between PG 1159 Stars and the Thin Helium-Enveloped Pulsating White Dwarf GD 358
• The Predicted Signature of Neutrino Emission in Observations of Pulsating Pre-White Dwarf Stars
• Evolutionary calculations of carbon dredge-up in helium envelope white dwarfs
• New evolutionary models for massive ZZ Ceti stars. II. The effects of crystallization on their pulsational properties
• Double-Diffusive Mixing-Length Theory, Semiconvection, and Massive Star Evolution
• Modeling lithium rich carbon stars in the Large Magellanic Cloud: an independent distance indicator ?
• Probing the core and envelope structure of DBV white dwarfs
• The double-layered chemical structure in DB white dwarfs

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