Metal Abundances in Hot DO White Dwarfs
Solar and Stellar Astrophysics
2012-09-25 v1
Abstract
The relatively high abundance of carbon in the hot DO white dwarf RE0503-289 indicates that it is a descendant of a PG1159 star. This is corroborated by the recent detection of the extremely high abundances of trans-Fe elements which stem from s-process nucleosynthesis in the precursor AGB star, dredged up by a late He-shell flash and possibly amplified by radiative levitation. On the other hand, the hottest known DO white dwarf, KPD0005+5106, cannot have evolved from a PG1159 star but represents a distinct He-rich evolutionary sequence that possibly originates from a binary white dwarf merger.
Keywords
Cite
@article{arxiv.1209.4977,
title = {Metal Abundances in Hot DO White Dwarfs},
author = {K. Werner and T. Rauch and E. Ringat and J. W. Kruk},
journal= {arXiv preprint arXiv:1209.4977},
year = {2012}
}
Comments
Proceedings, 18th European White Dwarf Workshop, Krakow, Poland, 13-17 Aug. 2012