Formation and Evolution of Hydrogen-Deficient post-AGB White Dwarfs

Bibcode
2005ASPC..334...61A
Althaus, L.; Panei, J.; Córsico, A.; García-Berro, E.; Scóccola, C.
Bibliographical reference

14th European Workshop on White Dwarfs, ASP Conference Series, Vol. 334 Proceedings of a meeting held at Kiel, July 19-23, 2004. Edited by D. Koester and S. Moehler. San Francisco: Astronomical Society of the Pacific, 2005, p.61

Advertised on:
7
2005
Number of authors
5
IAC number of authors
0
Citations
0
Refereed citations
0
Description
We explore the formation and evolution of hydrogen-deficient post-AGB white dwarf stars by computing the complete evolution of an initially 2.7 Msun star from the ZAMS through the thermally pulsing and mass-loss phases, the born-again stage to the white dwarf stage. A time-dependent scheme for the simultaneous treatment of abundance changes caused by nuclear reactions, diffusive overshooting, salt fingers and convection is considered. In addition, microscopic element diffusion is taken into account during the white dwarf evolution. Relevant aspects for PG 1159 stars and DB evolution are studied in the frame of these new evolutionary models. 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 PG 1159-DB-DQ.
Type
Non-refereed

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